Article(id=1199782976843251790, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1199782966441378761, articleNumber=null, orderNo=null, doi=10.16438/j.0513-4870.2024-0509, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1716825600000, receivedDateStr=2024-05-28, revisedDate=1721145600000, revisedDateStr=2024-07-17, acceptedDate=null, acceptedDateStr=null, onlineDate=1763980152568, onlineDateStr=2025-11-24, pubDate=1733932800000, pubDateStr=2024-12-12, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1763980152568, onlineIssueDateStr=2025-11-24, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1763980152568, creator=13701087609, updateTime=1763980152568, updator=13701087609, issue=Issue{id=1199782966441378761, tenantId=1146029695717560320, journalId=1189982191388893191, year='2024', volume='59', issue='12', pageStart='3179', pageEnd='3412', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1763980150088, creator=13701087609, updateTime=1764224975369, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1200809838151324146, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1199782966441378761, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1200809838151324147, tenantId=1146029695717560320, journalId=1189982191388893191, issueId=1199782966441378761, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=3315, endPage=3324, ext={EN=ArticleExt(id=1199782977174601824, articleId=1199782976843251790, tenantId=1146029695717560320, journalId=1189982191388893191, language=EN, title=Design, synthesis and relational biological researches of novel acetyl-contained sulfanilamide tertiary amine thiol azole compounds and sulfanilamide tertiary amine amino azole compounds, columnId=null, journalTitle=Acta Pharmaceutica Sinica, columnName=null, runingTitle=null, highlight=null, articleAbstract=

As an important synthetic antibacterial drug, sulfonamides play an important role in the anti-infection field. Based on the research and development status of sulfonamides, this paper broke the classical structure of sulfanilamide, and designed and synthesized a series of acetyl-contained sulfanilamide tertiary amine thiol azole compounds and sulfanilamide tertiary amine amino azole compounds. The structures were confirmed by 1H NMR, 13C NMR and HRMS. The antimicrobial activity of synthesized compounds in vitro was tested. The antimicrobial activity of amino triazole compound 7a gave stronger activity against Pseudomonas aeruginosa than that of positive control drug norfloxacin, and its inhibitory activity against Staphylococcus aureus was close to that of norfloxacin. The interaction between compound 7a and calf thymus DNA was studied, and the docking experiment between this compound and DNA was also researched.

, correspAuthors=Hui-zhen ZHANG, authorNote=null, correspAuthorsNote=null, copyrightStatement=Copyright ©2024 Acta Pharmaceutica Sinica. All rights reserved., copyrightOwner=null, extLink=null, articleAbsUrl=null, sourceXml=null, magXml=null, pdfUrl=null, pdf=null, pdfFileSize=null, pdfExtLink=null, richHtmlUrl=null, mobilePdfUrl=null, reviewReport=null, pdfFirstPage=null, abstractGraph=null, abstractGraphContent=null, abstractVideo=null, citation=null, cebUrl=null, magXmlContent=null, mapNumber=null, authorCompany=null, fund=null, authors=null, authorsList=Dan-yang FENG, Liu-xue ZHU, Shi-ju YANG, Rui YAN, Hui-zhen ZHANG, Ying WANG), CN=ArticleExt(id=1199782980471324925, articleId=1199782976843251790, tenantId=1146029695717560320, journalId=1189982191388893191, language=CN, title=新型乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物的设计合成及相关抗微生物作用研究, columnId=1190335348896011050, journalTitle=药学学报, columnName=研究论文, runingTitle=null, highlight=null, articleAbstract=

磺胺类化合物作为重要的人工合成抗菌药, 在抗感染领域发挥重要作用。本文基于磺胺类药物研发现状, 突破磺胺经典结构, 设计合成一系列乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物, 结构经 1H NMR、13C NMR和HRMS确认。测试了新化合物的体外抗微生物活性, 氨基三唑化合物7a的抗铜绿假单胞菌活性强于阳性对照药物诺氟沙星, 且其对金黄色葡萄球菌的抑制活性接近于诺氟沙星。初步研究了化合物7a与小牛胸腺DNA的相互作用, 并进行了化合物与DNA的对接实验研究。

, correspAuthors=张慧珍, authorNote=null, correspAuthorsNote=
*张慧珍, Tel: 15653972056, E-mail:
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Reagents and reaction conditions: (a) chlorosulfuric acid, 0 ℃; (b) ammonium hydroxide, 0 ℃; (c) halobenzyl halide, potassium carbonate, acetone, 60 ℃; (d) 1, 3-dibromopropane, potassium carbonate, acetone, 60 ℃; (e) amino or thiol azole, potassium carbonate, acetonitrile, 70 ℃ , figureFileSmall=HR9BSNU9t0rePx7OEaacgA==, figureFileBig=OGbbauw+XR1VFPjRdryQYg==, tableContent=null), ArticleFig(id=1200378740728525008, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=EN, label=null, caption=null, figureFileSmall=DwAXRBrOsjkxKVf06CES+A==, figureFileBig=mBM+N31HxItAc1YthAo3uA==, tableContent=null), ArticleFig(id=1200378740921463000, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=CN, label=Figure 1, caption= UV absorption spectra of DNA with different concentrations of compound <strong>7a</strong> (pH = 7.4, room temperature) [<i>c</i> (DNA) = 5.76×10<sup>-8</sup> μmol·mL<sup>-1</sup>, and <i>c</i> (<strong>7a</strong>) = 0-12×10<sup>-9</sup> μmol·mL<sup>-1</sup> for curves a-g respectively at increment 2×10<sup>-9</sup>] , figureFileSmall=DwAXRBrOsjkxKVf06CES+A==, figureFileBig=mBM+N31HxItAc1YthAo3uA==, tableContent=null), ArticleFig(id=1200378741147955427, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=EN, label=null, caption=null, figureFileSmall=c2fKG0fJVQsr+pKkpIoE3g==, figureFileBig=DKhfmkmIMvVLDZvLJJ8nYw==, tableContent=null), ArticleFig(id=1200378741416390892, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=CN, label=Figure 2, caption= Comparison of absorption at 260 nm between the <strong>7a</strong>-DNA complex and the sum values of free DNA and free compound <strong>7a</strong> [<i>c</i> (DNA) = 5.76×10<sup>-8</sup> μmol·mL<sup>-1</sup>, and <i>c</i> (<strong>7a</strong>) = 0-12×10<sup>-9</sup> μmol·mL<sup>-1</sup> for curves a-g respectively at increment 2×10<sup>-9</sup>] , figureFileSmall=c2fKG0fJVQsr+pKkpIoE3g==, figureFileBig=DKhfmkmIMvVLDZvLJJ8nYw==, tableContent=null), ArticleFig(id=1200378741600940278, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=EN, label=null, caption=null, figureFileSmall=dbbyC5jzUxzCvRZtBgrQLg==, figureFileBig=d/FCd+5BhRBIKcYc3D0/MA==, tableContent=null), ArticleFig(id=1200378742787928321, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=CN, label=Figure 3, caption= Plot of <i>A</i><sub>0</sub>/(<i>A</i>-<i>A</i><sub>0</sub>) <i>versus</i> <strong>1</strong>/[<strong>7a</strong>] , figureFileSmall=dbbyC5jzUxzCvRZtBgrQLg==, figureFileBig=d/FCd+5BhRBIKcYc3D0/MA==, tableContent=null), ArticleFig(id=1200378742913757448, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=EN, label=null, caption=null, figureFileSmall=nsDqmYLIfs2icIVpuyA/wg==, 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articleId=1199782976843251790, language=CN, label=Figure 5, caption= UV Absorption spectra of the competitive reaction between <strong>7a</strong> and NR with DNA [<i>c</i> (DNA) = 5.76×10<sup>-8</sup> μmol·mL<sup>-1</sup>, <i>c</i> (NR) = 2×10<sup>-8</sup> μmol·mL<sup>-1</sup>, and <i>c</i> (<strong>7a</strong>) = 0-12×10<sup>-9</sup> μmol·mL<sup>-1</sup> for curves a-g respectively at increment 2×10<sup>-9</sup> μmol·mL<sup>-1</sup>] , figureFileSmall=feq0sbFbGBLVW79cfUjouQ==, figureFileBig=6VpF7hBzw9xz3xKI15rM/g==, tableContent=null), ArticleFig(id=1200378743442239782, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=EN, label=null, caption=null, figureFileSmall=NyfNthLGVDWvQda7/b7RuQ==, figureFileBig=e5QCVNnzqSt3fwS3d7P69w==, tableContent=null), ArticleFig(id=1200378743584846126, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=CN, label=Figure 6, caption= Molecular modeling of compound <strong>7a</strong> and DNA hexamer duplex (PDB: 3FT6) , figureFileSmall=NyfNthLGVDWvQda7/b7RuQ==, figureFileBig=e5QCVNnzqSt3fwS3d7P69w==, tableContent=null), ArticleFig(id=1200378743735841079, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
Compd. MIC/μmol·mL-1 MIC/μmol·mL-1
S. aureus B. subtilis M. luteus B. proteus P. aeruginosa E. coli S. typhimurium S. dysenteriae
6a 0.289 0.578 0.578 0.289 0.144 0.289 0.289 0.578
6b 0.144 0.289 0.578 0.578 0.072 0.144 0.578 0.144
6c 0.578 0.289 0.578 0.144 0.144 0.289 0.289 0.289
6d 0.139 0.557 0.278 0.278 0.139 0.139 0.278 0.139
6e 0.278 0.139 0.557 0.278 0.139 0.278 0.139 0.139
6f 0.259 0.130 0.518 0.130 0.259 0.130 0.130 0.259
7a 0.036 0.072 0.143 0.143 0.036 0.072 0.143 0.143
7b 0.069 0.035 0.069 0.069 0.035 0.276 0.138 0.138
7c 0.134 0.134 0.067 0.033 0.033 0.067 0.134 0.067
7d 0.257 0.129 0.129 0.064 0.129 0.257 0.257 0.129
8a 0.138 0.069 0.035 0.035 0.069 0.069 0.138 0.138
8b 0.267 0.033 0.133 0.133 0.067 0.133 0.033 0.067
8c 0.069 0.069 0.035 0.138 0.035 0.035 0.138 0.138
Sulfanilamide 2.977 > 2.977 2.977 > 2.977 2.977 2.977 2.977 2.977
Norfloxacin 0.025 0.050 0.025 0.025 0.050 0.050 0.025 0.050
), ArticleFig(id=1200378743886836031, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=CN, label=Table 1, caption=

In vitro antibacterial activities of acetyl-contained sulfonamide tertiary amine azole compounds 6-8 expressed as MIC (μmol·mL-1). MIC: Minimal inhibit concentration; S. aureus: Staphylococcus aureus (ATCC25923); B. subtilis: Bacillus subtilis; M. luteus: Micrococcus luteus (ATCC4698); B. proteus: Bacillus proteus (ATCC13315); P. aeruginosa: Pseudomonas aeruginosa; E. coli: Escherichia coli; S. typhimurium: Salmonella typhimurium; S. dysenteriae: Shigella dysenteriae; C. albicans: Candida albicans (ATCC76615); S. cerevisia: Saccharomyces cerevisia; C. utilis: Candida utilis; M. Ruber: Monascus Ruber

, figureFileSmall=null, figureFileBig=null, tableContent=
Compd. MIC/μmol·mL-1 MIC/μmol·mL-1
S. aureus B. subtilis M. luteus B. proteus P. aeruginosa E. coli S. typhimurium S. dysenteriae
6a 0.289 0.578 0.578 0.289 0.144 0.289 0.289 0.578
6b 0.144 0.289 0.578 0.578 0.072 0.144 0.578 0.144
6c 0.578 0.289 0.578 0.144 0.144 0.289 0.289 0.289
6d 0.139 0.557 0.278 0.278 0.139 0.139 0.278 0.139
6e 0.278 0.139 0.557 0.278 0.139 0.278 0.139 0.139
6f 0.259 0.130 0.518 0.130 0.259 0.130 0.130 0.259
7a 0.036 0.072 0.143 0.143 0.036 0.072 0.143 0.143
7b 0.069 0.035 0.069 0.069 0.035 0.276 0.138 0.138
7c 0.134 0.134 0.067 0.033 0.033 0.067 0.134 0.067
7d 0.257 0.129 0.129 0.064 0.129 0.257 0.257 0.129
8a 0.138 0.069 0.035 0.035 0.069 0.069 0.138 0.138
8b 0.267 0.033 0.133 0.133 0.067 0.133 0.033 0.067
8c 0.069 0.069 0.035 0.138 0.035 0.035 0.138 0.138
Sulfanilamide 2.977 > 2.977 2.977 > 2.977 2.977 2.977 2.977 2.977
Norfloxacin 0.025 0.050 0.025 0.025 0.050 0.050 0.025 0.050
), ArticleFig(id=1200378744025248073, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=EN, label=null, caption=null, figureFileSmall=null, figureFileBig=null, tableContent=
Compd. MIC/μmol·mL-1
C. albicans S. cerevisia C. utilis M. Ruber
6a 0.289 0.144 0.289 0.578
6b 0.289 0.144 0.578 0.289
6c 0.289 0.289 0.144 0.144
6d 0.278 0.139 0.139 0.069
6e 0.557 0.139 0.278 0.139
6f 0.259 0.259 0.130 0.065
7a 0.287 0.287 0.143 0.143
7b 0.138 0.276 0.069 0.276
7c 0.267 0.134 0.134 0.067
7d 0.129 0.257 0.064 0.129
8a 0.138 0.276 0.069 0.276
8b 0.133 0.267 0.267 0.133
8c 0.277 0.069 0.138 0.277
Sulfanilamide > 2.977 > 2.977 > 2.977 > 2.977
Fluconazole 0.026 0.052 0.052 0.837
), ArticleFig(id=1200378744163660109, tenantId=1146029695717560320, journalId=1189982191388893191, articleId=1199782976843251790, language=CN, label=Table 2, caption=

In vitro antifungal activities of acetyl-contained sulfonamide tertiary amine azole compounds 6-8

, figureFileSmall=null, figureFileBig=null, tableContent=
Compd. MIC/μmol·mL-1
C. albicans S. cerevisia C. utilis M. Ruber
6a 0.289 0.144 0.289 0.578
6b 0.289 0.144 0.578 0.289
6c 0.289 0.289 0.144 0.144
6d 0.278 0.139 0.139 0.069
6e 0.557 0.139 0.278 0.139
6f 0.259 0.259 0.130 0.065
7a 0.287 0.287 0.143 0.143
7b 0.138 0.276 0.069 0.276
7c 0.267 0.134 0.134 0.067
7d 0.129 0.257 0.064 0.129
8a 0.138 0.276 0.069 0.276
8b 0.133 0.267 0.267 0.133
8c 0.277 0.069 0.138 0.277
Sulfanilamide > 2.977 > 2.977 > 2.977 > 2.977
Fluconazole 0.026 0.052 0.052 0.837
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新型乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物的设计合成及相关抗微生物作用研究
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冯丹阳 , 祝刘雪 , 杨士举 , 颜瑞 , 张慧珍 * , 王颖
药学学报 | 研究论文 2024,59(12): 3315-3324
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药学学报 | 研究论文 2024, 59(12): 3315-3324
新型乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物的设计合成及相关抗微生物作用研究
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冯丹阳, 祝刘雪, 杨士举, 颜瑞, 张慧珍* , 王颖
作者信息
  • 临沂大学医学院, 山东 临沂 276000

通讯作者:

*张慧珍, Tel: 15653972056, E-mail:
Design, synthesis and relational biological researches of novel acetyl-contained sulfanilamide tertiary amine thiol azole compounds and sulfanilamide tertiary amine amino azole compounds
Dan-yang FENG, Liu-xue ZHU, Shi-ju YANG, Rui YAN, Hui-zhen ZHANG* , Ying WANG
Affiliations
  • School of Medicine, Linyi University, Linyi 276000, China
出版时间: 2024-12-12 doi: 10.16438/j.0513-4870.2024-0509
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磺胺类化合物作为重要的人工合成抗菌药, 在抗感染领域发挥重要作用。本文基于磺胺类药物研发现状, 突破磺胺经典结构, 设计合成一系列乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物, 结构经 1H NMR、13C NMR和HRMS确认。测试了新化合物的体外抗微生物活性, 氨基三唑化合物7a的抗铜绿假单胞菌活性强于阳性对照药物诺氟沙星, 且其对金黄色葡萄球菌的抑制活性接近于诺氟沙星。初步研究了化合物7a与小牛胸腺DNA的相互作用, 并进行了化合物与DNA的对接实验研究。

磺胺  /  叔胺  /  唑环  /  抗细菌  /  抗真菌

As an important synthetic antibacterial drug, sulfonamides play an important role in the anti-infection field. Based on the research and development status of sulfonamides, this paper broke the classical structure of sulfanilamide, and designed and synthesized a series of acetyl-contained sulfanilamide tertiary amine thiol azole compounds and sulfanilamide tertiary amine amino azole compounds. The structures were confirmed by 1H NMR, 13C NMR and HRMS. The antimicrobial activity of synthesized compounds in vitro was tested. The antimicrobial activity of amino triazole compound 7a gave stronger activity against Pseudomonas aeruginosa than that of positive control drug norfloxacin, and its inhibitory activity against Staphylococcus aureus was close to that of norfloxacin. The interaction between compound 7a and calf thymus DNA was studied, and the docking experiment between this compound and DNA was also researched.

sulfonamide  /  tertiary amine  /  azole  /  antibacterial  /  antifungal
冯丹阳, 祝刘雪, 杨士举, 颜瑞, 张慧珍, 王颖. 新型乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物的设计合成及相关抗微生物作用研究. 药学学报, 2024 , 59 (12) : 3315 -3324 . DOI: 10.16438/j.0513-4870.2024-0509
Dan-yang FENG, Liu-xue ZHU, Shi-ju YANG, Rui YAN, Hui-zhen ZHANG, Ying WANG. Design, synthesis and relational biological researches of novel acetyl-contained sulfanilamide tertiary amine thiol azole compounds and sulfanilamide tertiary amine amino azole compounds[J]. Acta Pharmaceutica Sinica, 2024 , 59 (12) : 3315 -3324 . DOI: 10.16438/j.0513-4870.2024-0509
磺胺类药物的发展历史可以追溯到上世纪30年代, 是人类历史上最早的合成抗菌药, 磺胺类药物的发现为化学治疗药物的发展奠定了坚实的基础, 使人类面对细菌感染所引起的疾病不再束手无策。磺胺类药物因其抗菌谱广、性质稳定、在体内吸收后分布广、用药方便等优点而备受关注[1]。其在临床上主要用于治疗全身性感染, 如败血症、尿路感染、伤寒、骨髓炎等, 也可用于肠道感染如菌痢、肠炎等, 以及灼伤感染、化脓性创面感染、眼科疾病等[2, 3]
磺胺作为第一类人工合成抗菌药, 在抗微生物领域发挥了重要作用。其在结构上与二氢叶酸类似, 能够与其产生竞争性拮抗, 抑制核酸类物质的合成, 从而发挥抗菌作用[4]。由于磺胺类药物在临床的广泛使用甚至滥用, 导致磺胺类药物耐药性严重, 已逐渐退出临床。因此, 迫切需要设计开发新型磺胺类抗微生物活性分子[5-8]。基于作者先前研究工作, 磺胺1, 2, 4-三唑类化合物具有较好的抗微生物活性[9], 为了继续探讨杂原子和不同唑环[10, 11]对生物活性的影响, 本文设计合成了一系列乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物, 对合成的化合物进行了结构鉴定, 测试了化合物的体外抗细菌抗真菌活性, 研究了化合物与小牛胸腺DNA的相互作用[12, 13], 并初步模拟了化合物与DNA的相互作用[14, 15]
新型乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物的合成见合成路线1。以乙酰苯胺为原料,冰浴条件下, 逐滴加入氯磺酸, 待乙酰苯胺完全溶解后, 60 ℃搅拌反应2 h, 冷却至室温后, 缓慢倾倒入碎冰中, 析出白色固体后, 抽滤。在冰浴条件下, 向滤饼中加入氨水, 搅拌反应3 h, 抽滤, 得到白色固体化合物3。不同取代的苄卤和化合物3在丙酮中, 60 ℃搅拌反应, 得到N-双取代化合物4N-单取代化合物5, 化合物5与1, 3-二溴丙烷继续反应, 得到叔胺化合物6a~f, 继而与氨基唑环或巯基唑环反应, 得到乙酰基取代的磺胺叔胺氨基唑类化合物7a~d和磺胺叔胺巯基唑类化合物8a~c
所合成乙酰基取代的磺胺类化合物的结构经1HNMR、13C NMR和HRMS确认(结果见实验方法部分)。部分化合物5a (CCDC 2369854)、5b (CCDC 2369855) 和4b (CCDC 2369856) 的结构经X-射线单晶衍射证实。
乙酰基取代的磺胺类化合物6~8的抗细菌活性结果如表 1。所合成的乙酰基取代的磺胺类化合物对所测试的细菌均有一定程度的抑制效果, 且其抑制能力均强于参考药物磺胺(minimal inhibit concentration, MIC ≥ 2.977 μmol·mL-1)。乙酰基取代的磺胺叔胺中间体6a~f显示中等强度的抑制活性(MIC = 0.072~0.578 μmol·mL-1)。间氟取代的化合物6b对铜绿假单胞菌(MIC = 0.072 μmol·mL-1) 给出类似参考药物诺氟沙星(MIC = 0.050 μmol·mL-1) 的抑制活性。乙酰基取代的磺胺叔胺氨基唑类化合物7a~d对细菌的抑制活性(MIC = 0.043~0.276 μmol·mL-1) 是中间体的2~16倍。氨基三唑化合物7a的抗铜绿假单胞菌活性(MIC = 0.036 μmol·mL-1) 强于阳性对照药物诺氟沙星(MIC = 0.050 μmol·mL-1), 且其对金黄色葡萄球菌的抑制活性接近于诺氟沙星。乙酰基取代的磺胺叔胺巯基唑类化合物8a~c (MIC = 0.033~0.267 μmol·mL-1) 的抗细菌活性与氨基唑类化合物7a~d相当。乙酰基取代的磺胺噻唑硫醚8b对枯草芽孢杆菌的抑制活性为诺氟沙星(MIC = 0.050 μmol·mL-1) 的2倍。巯基三唑化合物8a对枯草芽孢杆菌、变形芽孢杆菌、藤黄微球菌、铜绿假单胞菌和大肠杆菌(MIC = 0.069、0.035、0.035、0.069和0.069 μmol·mL-1) 的抑制活性与诺氟沙星(MIC = 0.050、0.025、0.025、0.050和0.050 μmol·mL-1) 类似。与磺胺烷基1, 2, 4-三唑化合物相比[9], 由于杂原子N和S原子的引入, 乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物的抗微生物活性有一定的提高。
乙酰基取代的磺胺类化合物的抗真菌活性结果显示(表 2), 制备的化合物均有中等的抗真菌活性, 其活性均强于参考药物磺胺(MIC > 2.977 μmol·mL-1)。然而总体来说, 其抗真菌能力弱于抗细菌能力。特别是所有乙酰基取代的磺胺类化合物对红曲霉菌的抑制活性(MIC = 0.065~0.578 μmol·mL-1) 均强于参考药物氟康唑(MIC = 0.837 μmol·mL-1)。乙酰基取代的磺胺氨基三唑化合物7a对红曲霉菌的抑制活性是氟康唑的5.9倍, 乙酰基取代的磺胺氨基噻唑7c对红曲霉菌的抑制活性是氟康唑的12.5倍。因此, 乙酰基取代的磺胺类化合物作为抗微生物活性分子具有潜在的应用价值, 值得进一步研究。
DNA作为重要的生物大分子在遗传信息的翻译、转录、复制起着非常重要的作用, 是众多药物在体内的重要作用靶点, 在生命科学领域引起广泛关注。活性小分子与DNA的相互作用研究对新型DNA靶点药物的研发具有非常重要的指导意义。小牛胸腺DNA由于价格低廉、简单易用, 被广泛作为研究DNA相互作用的模型。本文采用紫外-可见光谱法初步研究了活性化合物7a和小牛胸腺DNA的相互作用[16]
在紫外-可见吸收光谱中, 小分子与DNA的嵌插作用通常会导致DNA吸收光谱出现减色红移现象, 而化合物导致DNA双链的二级结构被破坏会使光谱显示增色性[17]。如图 1所示, 随着化合物7a的加入, DNA在260 nm处的吸光度值逐渐增大, 吸收峰出现红移, 可能是化合物7a中的芳香环结构与DNA的碱基对之间产生了相互作用使共轭体系增大导致。通过分析在260 nm处, DNA和化合物7a混合体系的吸光度值明显小于游离的DNA和化合物7a的吸光度之和, 混合体系出现减色性(图 2), 初步说明化合物7a可能和DNA发生了嵌插作用[18, 19]
基于DNA吸收光谱加入化合物7a时的变化, 用方程(1) 分析计算DNA与化合物的结合常数K
$ \frac{{A}_{0}}{A-{A}_{0}} = \frac{{\xi }_{C}}{{\xi }_{D-C}-{\xi }_{C}}+\frac{{\xi }_{C}}{{\xi }_{D-C}-{\xi }_{C}}\times \frac{1}{K\left[Q\right]} $
A0A分别代表无和有化合物7a存在下的DNA吸光度值, ξCξD-C表示化合物7a7a-DNA体系的吸收系数, 根据方程和吸收滴定拟合曲线图(图 3), 可计算出相应的结合常数K = 6.64×107 mL·μmol-1, R = 0.999, SD = 0.02, P < 0.01 (R代表相关性系数, SD是标准偏差, P是显著性差异)。
中性红(neutral red, NR) 能够与DNA发生嵌插作用, 且其水溶液可长时间稳定存在, 因此, 选用NR作为探针初步研究化合物7a与DNA可能的相互作用模式。NR在460 nm处有特征吸收峰, 随着DNA的加入, 其在460 nm处的吸光度值逐渐降低, 在550 nm处出现一个新的吸收峰, 说明随着DNA的加入, 游离的NR逐渐减少, 并形成了新的DNA-NR复合物, 且复合物在550 nm左右具有吸收峰(图 4)[20]
随着化合物7a加入DNA-NR体系中, 在550 nm左右的DNA-NR复合物的吸光度逐渐下降, 460 nm处游离的NR的特征吸收峰强度逐渐升高, 与图 4中的吸收光谱显示出相反的过程(图 5)。结果表明, 化合物7a可以竞争性嵌插入到DNA的双螺旋结构中, 代替NR, 与DNA发生络合, 形成了7a-DNA络合物。因此, 化合物可能是通过嵌入微生物DNA的双螺旋结构中, 抑制DNA的复制、转录等过程, 阻碍微生物的复制, 从而发挥抗微生物活性。
分子对接研究被广泛用于研究小分子与DNA的结合模式[21, 22]。本研究选择CT-DNA序列(PDB code: 3FT6) 作为受体模型, 进行化合物7a与DNA六聚体双螺旋结构的分子对接研究, 以初步了解化合物与DNA可能的相互作用模式。实验结果表明, 化合物7a可能通过氢键与DNA的残基DG-5发生相互作用形成络合物, 从而抑制DNA复制(图 6), 对接结果与光谱实验结果一致。
本文以乙酰苯胺和氯磺酸为原料, 经过磺酰化、氨解、烷基化等多步反应合成了一系列乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物, 其结构经1H NMR、13C NMR和HRMS证实, 其中重要中间体结构经X-射线单晶衍射证实。合成化合物对所测试的细菌、真菌均显示一定的抑制活性, 且其抑制能力均强于参考药物磺胺(MIC ≥ 2.977 μmol·mL-1)。氨基三唑化合物7a (MIC = 0.036 μmol·mL-1) 的抗铜绿假单胞菌活性强于阳性对照药物诺氟沙星(MIC = 0.050 μmol·mL-1), 且其对金黄色葡萄球菌的抑制活性接近于诺氟沙星。乙酰基取代的磺胺噻唑硫醚8b (MIC = 0.033 μmol·mL-1) 对枯草芽孢杆菌的抑制活性是诺氟沙星(MIC = 0.050 μmol·mL-1) 的2倍。特别是所有乙酰基取代的磺胺类化合物对红曲霉菌的抑制活性均强于参考药物氟康唑。与磺胺烷基1, 2, 4-三唑化合物相比, 由于杂原子N和S原子的引入, 乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物的抗微生物活性有一定的提高。化合物7a与小牛胸腺DNA的相互作用结果表明, 化合物可能是通过嵌入DNA双螺旋结构, 抑制DNA复制, 发挥抗微生物活性。化合物与DNA的对接实验结果显示, 化合物可能是通过形成氢键, 与DNA络合, 从而抑制DNA的复制和转录, 显示抗微生物活性。因此, 乙酰基取代的磺胺叔胺巯基唑类和磺胺叔胺氨基唑类化合物作为抗微生物活性分子具有进一步研究开发的潜力, 化合物的体内活性测试、毒性研究和抗微生物作用机制的进一步阐明正在进行中。
本文化合物的1H NMR及13C NMR使用核磁共振仪[Bruker AV 600核磁共振仪(TMS内标)]; 高分辨质谱仪(Bruker Daltonics); 电热鼓风干燥箱(DHG-9023A, 郑州长城科工贸有限公司); 台式恒温振荡器(THZ-D/THZ-C太仓市实验设备厂); 立式压力蒸汽灭菌器(LDZX-50KB, 上海申安医疗机械厂); 紫外-可见分光光度计(P5型, 上海美谱达仪器有限公司)。硅胶(青岛海洋化工厂); 乙酰苯胺、氯磺酸、苄卤、烷基二溴化物、唑环、诺氟沙星、氟康唑(上海麦克林生化科技股份有限公司); 牛肉膏、蛋白胨、琼脂、葡萄糖、酵母浸膏等(国药集团化学试剂有限公司); 小牛胸腺DNA、中性红、三(羟甲基)氨基甲烷(北京索莱宝科技有限公司)。所有试剂均为市售分析纯或化学纯, 除特别说明外, 一般不经纯化处理直接使用。
在冰水浴条件下, 向150 mL圆底烧瓶中加入乙酰苯胺(10.055 g, 3.73×104 μmol), 置于磁力搅拌器上, 逐滴加入氯磺酸(25 mL, 1.88×105 μmol), 用带有干燥管的尾气吸收装置将反应产生的酸雾导入碱液中。待圆底烧瓶中固体完全溶解后, 将其转移至60 ℃温水浴中搅拌反应2 h, 冷却至室温。在充分搅拌下缓慢将反应液倒入盛有约75 g碎冰的250 mL烧杯中, 用玻璃棒将大块固体捣碎使成均匀的白色小颗粒, 抽滤, 以少量甲醇多次洗涤, 晾干, 得到淡粉色固体。将得到的固体转入250 mL烧杯中, 在搅拌下缓慢滴加17.5 mL浓氨水, 滴加完毕后搅拌反应3 h。抽滤, 用冰水洗涤除去过量的氨水, 干燥得到7.550 g白色固体, 产率为75.3%, m.p. 215~217 ℃ (文献[5]: m.p. 216~218 ℃)。
化合物4a的合成参考文献[9]方法, 得白色固体4a, 产率为34.2%, m.p. 133~135 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.72 (s, 2H), 7.66 (s, 2H), 7.31 (s, 2H), 7.17 (d, J = 20.6 Hz, 2H), 7.01 (s, 2H), 6.88 (d, J = 9.3 Hz, 2H), 4.45 (s, 4H), 2.23 (s, 3H); 13C NMR (151 MHz, CDCl3) δC: 168.64, 161.55, 159.91, 141.95, 130.68, 129.49, 128.41, 124.09, 122.79, 119.28, 115.03, 45.43, 24.70。HRMS (TOF) calcd. for C22H20F2N2O3S [M+Na]+, 453.105 5; found, 453.108 3。
化合物4b的合成参考文献[9]方法, 得白色固体4b, 产率为31.6%, m.p. 113~115 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.79 (s, 2H), 7.72 (s, 2H), 7.20 (d, J = 21.7 Hz, 2H), 6.92 (s, 2H), 6.87 (s, 2H), 6.79 (s, 2H), 4.32 (s, 4H), 2.25 (s, 3H); 13C NMR (151 MHz, CDCl3) δC: 168.67, 163.62, 161.99, 142.14, 138.11, 130.00, 128.45, 124.04, 119.45, 115.26, 114.72, 50.74, 24.7。HRMS (TOF) calcd. for C22H20F2N2O3S [M+Na]+, 453.105 5; found, 453.107 3。
化合物4c的合成参考文献[9]方法, 得白色固体4c, 产率为33.4%, m.p. 117~119 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.78 (s, 2H), 7.71 (s, 2H), 7.03 (s, 4H), 6.91 (s, 4H), 4.27 (s, 4H), 2.24 (s, 3H); 13C NMR (151 MHz, CDCl3) δC: 168.68, 163.13, 161.49, 142.03, 131.31, 130.17, 128.42, 115.41, 50.37, 29.29。HRMS (TOF) calcd. for C22H20F2N2O3S [M+Na]+, 453.105 5; found, 453.106 7。
化合物4d的合成参考文献[9]方法, 得白色固体4d, 产率为38.9%, m.p. 155~157 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.79 (s, 2H), 7.72 (s, 2H), 7.18 (d, J = 30.5 Hz, 4H), 7.00 (s, 4H), 4.29 (s, 4H), 2.26 (s, 3H); 13C NMR (151 MHz, CDCl3) δC: 168.52, 142.12, 137.52, 134.78, 134.42, 129.73, 128.55, 128.44, 128.03, 126.60, 119.45, 24.75。HRMS (TOF) calcd. for C22H20Cl2N2O3S [M+Na]+, 485.046 4; found, 485.045 9。
化合物4e的合成参考文献[9]方法, 得白色固体4e, 产率为35.6%, m.p. 177~179 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.81~7.77 (m, 2H), 7.71 (s, 2H), 7.03 (s, 4H), 6.91 (s, 4H), 4.27 (s, 4H), 2.24 (s, 3H); 13C NMR (151 MHz, CDCl3) δC: 168.77, 142.09, 134.84, 131.29, 130.22, 128.40, 119.46, 115.27, 50.40, 24.68。HRMS (TOF) calcd. for C22H20Cl2N2O3S [M+Na]+, 485.046 4; found, 485.046 1。
化合物4f的合成参考文献[9]方法, 得白色固体4f, 产率为31.7%, m.p. 183~185 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.78 (d, J = 8.7 Hz, 1H), 7.76 (s, 2H), 7.60 (s, 2H), 7.33 (d, J = 18.6 Hz, 1H), 7.30 (d, J = 9.3 Hz, 1H), 4.52 (s, 1H), 4.25 (s, 2H), 2.21 (s, 3H); 13C NMR (151 MHz, CDCl3) δC: 169.15, 142.72, 133.80, 130.65, 130.38, 129.77, 129.57, 128.37, 127.14, 125.94, 119.23, 45.25, 24.75。HRMS (TOF) calcd. for C15H14Cl2N2O3S [M+Na]+, 394.999 4; found, 394.999 6。
化合物5a的合成参考文献[9]方法, 得白色固体5a, 产率为40.2%, m.p. 122~124 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.79 (s, 2H), 7.64 (s, 2H), 7.24 (s, 2H), 7.08 (s, 1H), 6.98 (s, 1H), 4.74 (s, 1H), 4.24 (s, 2H), 2.24 (s, 3H)。HRMS (TOF) calcd. for C15H15FN2O3S [M+Na]+, 345.067 9; found, 345.068 8。
化合物5b的合成参考文献[9]方法, 得白色固体5b, 产率为29.8%, m.p. 126~128 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.83 (s, 2H), 7.69 (s, 2H), 7.39 (s, 1H), 6.98 (d, J = 54.0 Hz, 3H), 4.72 (s, 1H), 4.17 (s, 2H), 2.25 (s, 3H)。HRMS (TOF) calcd. for C15H15FN2O3S [M+Na]+, 345.067 9; found, 345.068 9。
化合物5c的合成参考文献[9]方法, 得白色固体5c, 产率为33.4%, m.p. 120~122 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.83 (s, 2H), 7.69 (s, 2H), 7.20 (s, 2H), 7.00 (s, 2H), 4.63 (s, 1H), 4.14 (s, 2H), 2.26 (s, 3H)。HRMS (TOF) calcd. for C15H15FN2O3S [M+Na]+, 345.067 9; found, 345.068 7。
化合物5d的合成参考文献[9]方法, 得白色固体5d, 产率为37.2%, m.p. 145~147 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.82 (s, 2H), 7.69 (s, 2H), 7.55 (d, J = 9.1 Hz, 1H), 7.24 (d, J = 3.4 Hz, 1H), 7.19 (s, 1H), 7.12 (s, 1H), 4.14 (s, 2H), 2.26 (s, 3H)。HRMS (TOF) calcd. for C15H15ClN2O3S [M+Na]+, 361.038 4; found, 361.039 4。
化合物5e的合成参考文献[9]方法, 得白色固体5e, 产率为30.2%, m.p. 190~192 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.83 (s, 2H), 7.69 (s, 2H), 7.20 (s, 2H), 7.00 (s, 2H), 5.37 (s, 1H), 4.14 (s, 2H), 2.26 (s, 3H)。HRMS (TOF) calcd. for C15H15ClN2O3S [M+Na]+, 339.056 5; found, 339.056 2。
化合物5f的合成参考文献[9]方法, 得白色固体5f, 产率为27.3%, m.p. 184~186 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.78 (d, J = 8.7 Hz, 1H), 7.76 (s, 2H), 7.60 (s, 2H), 7.33 (d, J = 18.6 Hz, 1H), 7.30 (d, J = 9.3 Hz, 1H), 4.52 (s, 1H), 4.25 (s, 2H), 2.21 (s, 3H); 13C NMR (151 MHz, CDCl3) δC: 169.15, 142.72, 133.80, 130.65, 130.38, 129.77, 129.57, 128.37, 127.14, 125.94, 119.23, 45.25, 24.75。HRMS (TOF) calcd. for C15H14Cl2N2O3S [M+Na]+, 394.999 4; found, 394.999 6。
化合物6a的合成参考文献[9]方法, 得黄色糖浆状化合物6a, 产率为70.1%, 1H NMR (600 MHz, CDCl3) δH: 7.77 (s, 2H), 7.70 (s, 2H), 7.46 (s, 1H), 7.30 (s, 1H), 7.16 (s, 1H), 7.03 (s, 1H), 4.41 (s, 2H), 3.28 (s, 4H), 2.24 (s, 3H), 1.96 (s, 2H); 13C NMR (151 MHz, CDCl3) δC: 168.71, 161.65, 160.01, 142.09, 130.95, 129.91, 128.48, 124.57, 123.18, 119.45, 115.41, 47.46, 45.79, 31.52, 30.08, 24.70。HRMS (TOF) calcd. for C18H20BrFN2O3S [M+Na]+, 465.025 4; found, 465.025 8。
化合物6b的合成参考文献[9]方法, 得白色固体6b, 产率为73.5%, m.p. 153~155 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.79 (s, 2H), 7.72 (s, 2H), 7.31 (d, J = 21.5 Hz, 1H), 7.10 (s, 1H), 7.02 (d, J = 25.9 Hz, 2H), 4.31 (s, 2H), 3.25 (d, J = 22.6 Hz, 4H), 2.25 (s, 3H), 1.93 (d, J = 27.1 Hz, 2H); 13C NMR (151 MHz, CDCl3) δC: 168.68, 163.80, 162.17, 142.13, 138.83, 130.34, 128.46, 123.86, 119.53, 115.12, 114.98, 52.51, 47.40, 31.55, 30.10, 24.70。HRMS (TOF) calcd. for C18H20BrFN2O3S [M+Na]+, 465.025 4; found, 465.025 1。
化合物6c的合成参考文献[9]方法, 得白色固体6c, 产率为72.4%, m.p. 91~93 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.76 (s, 2H), 7.70 (s, 2H), 7.29~7.25 (m, 2H), 7.01 (s, 2H), 4.26 (s, 2H), 3.21 (d, J = 16.0 Hz, 4H), 2.22 (s, 3H), 1.88 (d, J = 27.1 Hz, 2H); 13C NMR (151 MHz, CDCl3) δC: 168.70, 161.73, 142.08, 134.02, 131.91, 130.10, 128.44, 119.53, 115.61, 52.32, 47.18, 31.61, 30.15, 24.70。HRMS (TOF) calcd. for C18H20BrFN2O3S [M+Na]+, 465.025 4; found, 465.025 8。
化合物6d的合成参考文献[9]方法, 得黄色糖浆化合物6d, 产率为75.7%, m.p. 88~90 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.78 (s, 2H), 7.72 (s, 2H), 7.63 (s, 1H), 7.28 (d, J = 6.1 Hz, 2H), 7.22 (s, 1H), 4.30 (s, 2H), 3.25 (d, J = 17.1 Hz, 4H), 2.25 (s, 3H), 1.93 (d, J = 27.0 Hz, 2H); 13C NMR (151 MHz, CDCl3) δC: 168.64, 142.13, 138.29, 134.67, 133.99, 130.03, 128.46, 128.37, 128.27, 126.44, 119.52, 52.40, 47.35, 31.56, 30.10, 24.72。HRMS (TOF) calcd. for C18H20BrClN2O3S [M+Na]+, 480.995 9; found, 480.996 7。
化合物6e的合成参考文献[9]方法, 得白色固体6e, 产率为78.3%, m.p. 102~104 ℃, 1H NMR (600 MHz, CDCl3) δH: 7.81 (s, 2H), 7.74 (s, 2H), 7.31 (s, 2H), 6.94 (s, 2H), 4.26 (s, 4H), 2.27 (s, 3H), 2.23 (s, 4H); 13C NMR (151 MHz, CDCl3) δC: 168.45, 135.67, 132.71, 132.15, 130.36, 129.79, 128.45, 127.71, 119.47, 50.64, 46.13, 31.86, 30.34, 24.79。HRMS (TOF) calcd. for C18H20BrClN2O3S [M+Na]+, 480.995 9; found, 480.997 7。
化合物6f的合成参考文献[9]方法, 得黄色糖浆状化合物6f, 产率为80.1%, 1H NMR (600 MHz, CDCl3) δH: 7.79 (s, 2H), 7.72 (s, 2H), 7.36 (d, J = 14.0 Hz, 1H), 7.24 (d, J = 79.6 Hz, 2H), 4.48 (s, 1H), 4.27 (s, 1H), 3.27 (d, J = 39.2 Hz, 4H), 2.24 (s, 3H), 1.93 (d, J = 31.3 Hz, 2H); 13C NMR (151 MHz, CDCl3) δC: 168.74, 142.16, 136.63, 133.81, 132.88, 130.33, 129.64, 128.50, 127.25, 119.54, 51.89, 49.90, 47.91, 30.52, 24.70。HRMS (TOF) calcd. for C18H19BrCl2N2O3S [M+Na]+, 514.956 9; found, 514.957 5。
向装有乙腈的圆底烧瓶中加入3-氨基-1, 2, 4-三唑(0.050 g, 5.89×102 μmol) 和化合物6b (0.256 g, 5.77×102 μmol) 60 ℃搅拌反应30 min, 冷却至室温后向反应体系中加入碳酸钾(0.095 g, 6.88×102 μmol), 升温至70 ℃继续搅拌反应, 薄层色谱(TLC展开剂: 二氯甲烷∶甲醇= 20∶1) 跟踪反应。反应结束后, 旋干溶剂, 加水溶解体系中的碳酸钾, 二氯甲烷萃取(3×30 mL), 合并有机相, 无水硫酸钠干燥, 浓缩, 柱层析[洗脱剂: 二氯甲烷∶甲醇= 20∶1 (v/v)] 得黄色糖浆状化合物7a, 产率为67.2%, 1H NMR (600 MHz, DMSO-d6) δH: 14.03 (s, 1H), 10.35 (s, 1H), 7.78 (s, 2H), 7.76 (s, 2H), 7.41 (s, 1H), 7.36~7.32 (m, 1H), 7.17 (d, J = 29.8 Hz, 2H), 5.75 (s, 1H), 4.34 (s, 2H), 3.17 (t, J = 7.3 Hz, 2H), 2.90 (t, δC: J = 7.0 Hz, 2H), 2.11 (s, 3H), 1.65 (d, J = 28.6 Hz, 2H); 13C NMR (151 MHz, DMSO-d6) δC: 169.52, 161.53, 159.90, 143.73, 132.75, 131.11, 130.21, 128.62, 124.95, 124.28, 119.22, 115.70, 55.35, 47.74, 45.91, 28.61, 24.62。HRMS (TOF) calcd. for C20H23FN6O3S [M+Na]+, 469.142 8; found, 469.144 6。
化合物7b的合成参考化合物7a的制备方法, 以化合物6d (0.450 g, 9.79×102 μmol)、2-氨基噁唑(0.083 g, 9.89×102 μmol) 和碳酸钾(0.164 g, 1.19×103 μmol) 为原料, 得黄色糖浆状化合物7b, 产率为65.1%, 1H NMR (600 MHz, DMSO-d6) δH: 10.35 (s, 1H), 7.80 (s, 2H), 7.79 (s, 2H), 7.48~7.09 (m, 6H), 6.49 (s, 1H), 4.31 (s, 2H), 3.30~3.16 (m, 2H), 3.14 (s, 2H), 2.11 (s, 3H), 1.40 (s, 2H); 13C NMR (151 MHz, DMSO-d6) δC: 169.51, 161.98, 143.71, 140.75, 133.53, 133.22, 131.98, 130.74, 128.56, 127.99, 127.80, 126.97, 119.25, 58.57, 51.24, 46.50, 31.61, 24.62。HRMS (TOF) calcd. for C21H23ClN4O4S [M+H]+, 463.120 2; found, 463.120 9。
化合物7c的合成参考化合物7a的制备方法, 以化合物6e (0.500 g, 1.09×103 μmol)、2-氨基噻唑(0.112 g, 1.12×103 μmol) 和碳酸钾(0.185 g, 1.34×103 μmol) 为原料, 得白色固体7c, 产率为70.3%, m.p. 121~123 ℃, H NMR (600 MHz, DMSO-d6) δH: 10.39 (s, 1H), 7.85 (s, 2H), 7.84 (s, 2H), 7.55 (s, 2H), 7.43 (s, 2H), 7.11 (s, 2H), 4.39 (s, 1H), 4.31 (s, 2H), 2.90 (s, 2H), 2.74 (s, 2H), 2.12 (s, 3H); 13C NMR (151 MHz, DMSO-d6) δC: 169.55, 162.76, 144.07, 138.27, 132.54, 131.17, 130.69, 130.62, 130.41, 129.02, 128.71, 119.34, 51.81, 36.24, 31.25, 24.64, 23.02。HRMS (TOF) calcd. for C21H23ClN4O3S2 [M+Na]+, 501.079 2; found, 501.078 8。
化合物7d的合成参考化合物7a的制备方法, 以化合物6f (0.415 g, 8.40×102 μmol)、5-氨基四唑(0.072 g, 8.45×102 μmol) 和碳酸钾(0.139 g, 1.01×103 μmol) 为原料, 得白色固体7d, 产率为52.4%, m.p. 104~106 ℃, 1H NMR (600 MHz, DMSO-d6) δH: 10.37 (s, 1H), 7.81 (d, J = 12.7 Hz, 2H), 7.75 (d, J = 15.9 Hz, 2H), 7.46 (d, J = 45.2 Hz, 2H), 7.32 (d, J = 16.7 Hz, 1H), 6.61 (s, 1H), 6.59 (s, 1H), 4.35 (d, J = 50.6 Hz, 2H), 3.95 (s, 2H), 3.13 (d, J = 28.9 Hz, 2H), 2.11 (s, 3H), 1.76~1.67 (m, 2H); 13C NMR (151 MHz, DMSO-d6) δC: 169.55, 167.47, 143.88, 139.10, 134.71, 132.85, 131.14, 130.57, 129.84, 128.63, 127.83, 119.30, 50.93, 49.78, 46.57, 28.26, 24.63。HRMS (TOF) calcd. for C19H21Cl2N7O3S [M+Na]+, 520.069 6; found, 520.070 4。
向含有20 mL乙腈的100 mL圆底烧瓶中加入3-巯基-1, 2, 4-三唑(0.080 g, 7.96×102 μmol)、化合物6a (0.350 g, 7.90×102 μmol) 和碳酸钾(0.132 g, 9.55×102 μmol) 在70 ℃下搅拌反应(期间随时TLC跟踪反应, 展开剂: 二氯甲烷∶甲醇= 20∶1)。反应结束后, 冷却至室温, 减压蒸馏。加水溶解反应体系中的固体, 二氯甲烷(30 mL×3) 萃取, 合并有机相, 无水硫酸钠干燥, 浓缩, 经硅胶柱色谱纯化[洗脱剂: 二氯甲烷∶甲醇= 20∶1 (v/v)], 得黄色固体8a, 产率为53.4%, m.p. 178~180 ℃, 1H NMR (600 MHz, DMSO-d6) δH: 10.29 (s, 1H), 8.02 (s, 1H), 7.74 (s, 2H), 7.73 (s, 2H), 7.35 (td, J = 7.7, 1.7 Hz, 1H), 7.30 (tdd, J = 7.5, 5.3, 1.7 Hz, 1H), 7.16~7.08 (m, 2H), 4.00 (s, 2H), 3.31 (s, 2H), 2.51 (s, 2H), 2.10 (s, 3H), 1.24 (s, 2H); 13C NMR (151 MHz, DMSO-d6) δC: 169.42, 161.18, 159.56, 143.23, 134.60, 130.68, 129.84, 128.10, 124.93, 124.70, 119.04, 115.56, 51.42, 47.78, 30.19, 28.33, 24.59。HRMS (TOF) calcd. for C20H22FN5O3S2 [M+Na]+, 486.104 0; found, 486.104 2。
化合物8b的合成参考化合物8a的制备方法, 以6c (0.415 g, 9.36×102 μmol)、2-巯基噻唑(0.111 g, 9.45×102 μmol) 和碳酸钾(0.156 g, 1.13×103 μmol) 为原料, 得白色固体8b, 产率为64.2%, m.p. 94~96 ℃, 1H NMR (600 MHz, DMSO-d6) δH: 10.34 (s, 1H), 7.79 (s, 2H), 7.78 (s, 2H), 7.69 (s, 1H), 7.63 (s, 1H), 7.35 (s, 2H), 7.15 (s, 2H), 4.27 (s, 2H), 3.16 (s, 2H), 2.98 (s, 2H), 2.11 (s, 3H), 1.65 (d, J = 28.8 Hz, 2H); 13C NMR (151 MHz, DMSO-d6) δC: 169.51, 163.75, 162.88, 161.27, 143.74, 143.25, 132.91, 130.59, 128.58, 115.78, 51.51, 47.50, 31.23, 28.15, 24.62。HRMS (TOF) calcd. for C21H22FN3O3S3 [M+H]+, 480.088 0; found, 480.087 6。
化合物8c的合成参考化合物8a的制备方法,以6f (0.419 g, 8.48×102 μmol)、2-巯基咪唑(0.085 g, 8.53×102 μmol) 和碳酸钾(0.141 g, 1.02×103 μmol) 为原料, 得黄色固体8c, 产率为49.2%, m.p. 102~104 ℃, 1H NMR (600 MHz, DMSO-d6) δH: 10.36 (s, 1H), 7.81 (s, 2H), 7.79 (s, 2H), 7.60 (s, 1H), 7.52 (s, 1H), 7.33 (s, 1H), 7.15 (s, H, imidazole-4-H), 7.24 (s, H, imidazole-5-H), 4.29 (s, 2H), 3.12 (s, 2H), 2.38 (s, 2H), 2.10 (s, 3H), 1.55 (d, J = 28.7 Hz, 2H); 13C NMR (151 MHz, DMSO-d6) δC: 169.52, 143.88, 139.31, 132.67, 131.55, 131.12, 130.57, 130.28, 128.69, 128.62, 125.47, 122.96, 119.29, 51.20, 48.01, 34.90, 27.95, 24.62。HRMS (TOF) calcd. for C21H22Cl2N4O3S2 [M+H]+, 513.058 3; found, 513.058 5。
化合物的体外抗微生物活性测试采用美国临床实验室标准协会(CLSI) 推荐的药敏实验方法[23]。化合物和参考药物均用二甲基亚砜(DMSO) 溶解, 配成6.4 mg·mL-1溶液。取无菌96孔板, 在每一孔中加入0.1 mL菌液。取0.1 mL用无菌肉汤稀释好的受试药液于1号孔中, 混匀后取0.1 mL于2号孔中, 依次倍比稀释至11号孔, 使各孔中DMSO含量均低于1%, 排除溶剂DMSO对体外抗细菌抗真菌活性测试的影响, 12号孔不含药物, 作阴性对照, 各药敏板在37 ℃下于恒温摇床上培养24 h。
对每组数据平行测试3次, 平均值±标准差表示, 使用origin75软件作图, 通过单因素分析计算显著性差异, P < 0.05表示差异有统计学意义。
作者贡献:冯丹阳负责化合物合成及文章的撰写; 祝刘雪负责化合物波谱数据解析和体外活性实验; 杨士举、颜瑞参与了部分合成和体外活性实验; 张慧珍负责课题规划, 指导化合物的设计及合成, 论文的修改、校对; 王颖负责实验技术指导。
利益冲突: 本文所有作者声明不存在利益冲突关系。
  • 山东省自然科学基金(ZR2020QB167)
  • 临沂大学本科一流课程(YLKC202318)
  • 临沂大学实验教学与实验技术研究项目(2023)
  • 临沂大学本科教学改革研究项目(2022)
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doi: 10.16438/j.0513-4870.2024-0509
  • 接收时间:2024-05-28
  • 首发时间:2025-11-24
  • 出版时间:2024-12-12
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  • 收稿日期:2024-05-28
  • 修回日期:2024-07-17
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山东省自然科学基金(ZR2020QB167)
临沂大学本科一流课程(YLKC202318)
临沂大学实验教学与实验技术研究项目(2023)
临沂大学本科教学改革研究项目(2022)
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    临沂大学医学院, 山东 临沂 276000

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2种不同金属材料的力学参数

Family
属数
Number of
genus
种数
Number of
species
占总种数比例
Percentage of
total species (%)

Genus
种数
Number of
species
占总种数比例
Percentage of total
species (%)
鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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