细菌DNA促旋酶和拓扑异构酶IV控制复制过程中DNA的拓扑状态,并且是抗菌药物发现的有效靶标。从我们最近报道的基于4,5,6,7-四氢苯并[1,2- d ]噻唑的DNA促旋酶B抑制剂开始,我们用苯并噻唑-2,6-二胺支架和在位置2和3互换的取代基取代了它们的中心核6.这导致来自大肠杆菌的DNA回旋酶的等量纳摩尔抑制剂表现出对两种细菌的金黄色葡萄球菌DNA回旋酶和拓扑异构酶IV的改善的抑制。化合物27是来自大肠杆菌和金黄色葡萄球菌的DNA促旋酶和拓扑异构酶IV的最平衡抑制剂。2-((2-(4,5-dibromo-1 H-吡咯-2-羧酰胺基)苯并噻唑-6-基)氨基)-2-氧乙酸(24)与大肠杆菌DNA的复合物的晶体结构旋转酶B揭示了该抑制剂在ATP结合口袋中的结合模式。只有一些化合物对革兰氏阳性细菌具有弱的抗菌活性。这些结果为针对具有抗菌活性的双重DNA促旋酶和拓扑异构酶IV抑制剂的基于结构的优化提供了基础。
Design, synthesis and antifungal activities of novel pyrrole alkaloid analogs
摘要:
A series of novel analogs of pyrrole alkaloid were designed and synthesized by a facile method and their structures were characterized by H-1 NMR, C-13 NMR and high-resolution mass spectrometry (HRMS). The structure of compound 2a was identified by 2D NMR including heteronuclear multiple-quantum coherence (HMQC), heteronuclear multiple-bond correlation (HMBC) and H-H correlation spectrometry (H-H COSY) spectra. Their antifungal activities against five fungi were evaluated, and the results indicated that some of the title compounds showed moderate fungicidal activities in vitro against Alternaria solani, Cercospora arachidicola, Fusarium omysporum, Gibberella zeae and Physalospora piricola at the dosage of 50 mu g mL(-1). Compound 2a and 3a exhibited good activities against P. piricola at low dosage. (C) 2011 Elsevier Masson SAS. All rights reserved.
Design, synthesis and antifungal activities of novel pyrrole alkaloid analogs
作者:Ming-Zhong Wang、Han Xu、Tuan-Wei Liu、Qi Feng、Shu-Jing Yu、Su-Hua Wang、Zheng-Ming Li
DOI:10.1016/j.ejmech.2011.01.031
日期:2011.5
A series of novel analogs of pyrrole alkaloid were designed and synthesized by a facile method and their structures were characterized by H-1 NMR, C-13 NMR and high-resolution mass spectrometry (HRMS). The structure of compound 2a was identified by 2D NMR including heteronuclear multiple-quantum coherence (HMQC), heteronuclear multiple-bond correlation (HMBC) and H-H correlation spectrometry (H-H COSY) spectra. Their antifungal activities against five fungi were evaluated, and the results indicated that some of the title compounds showed moderate fungicidal activities in vitro against Alternaria solani, Cercospora arachidicola, Fusarium omysporum, Gibberella zeae and Physalospora piricola at the dosage of 50 mu g mL(-1). Compound 2a and 3a exhibited good activities against P. piricola at low dosage. (C) 2011 Elsevier Masson SAS. All rights reserved.
Discovery of Benzothiazole Scaffold-Based DNA Gyrase B Inhibitors
resulted in equipotent nanomolar inhibitors of DNAgyrase from Escherichia coli displaying improved inhibition of Staphylococcus aureus DNAgyrase and topoisomeraseIV from both bacteria. Compound 27 was the most balanced inhibitor of DNAgyrase and topoisomeraseIV from both E. coli and S. aureus. The crystal structure of the 2-((2-(4,5-dibromo-1H-pyrrole-2-carboxamido)benzothiazol-6-yl)amino)-2-oxoacetic
细菌DNA促旋酶和拓扑异构酶IV控制复制过程中DNA的拓扑状态,并且是抗菌药物发现的有效靶标。从我们最近报道的基于4,5,6,7-四氢苯并[1,2- d ]噻唑的DNA促旋酶B抑制剂开始,我们用苯并噻唑-2,6-二胺支架和在位置2和3互换的取代基取代了它们的中心核6.这导致来自大肠杆菌的DNA回旋酶的等量纳摩尔抑制剂表现出对两种细菌的金黄色葡萄球菌DNA回旋酶和拓扑异构酶IV的改善的抑制。化合物27是来自大肠杆菌和金黄色葡萄球菌的DNA促旋酶和拓扑异构酶IV的最平衡抑制剂。2-((2-(4,5-dibromo-1 H-吡咯-2-羧酰胺基)苯并噻唑-6-基)氨基)-2-氧乙酸(24)与大肠杆菌DNA的复合物的晶体结构旋转酶B揭示了该抑制剂在ATP结合口袋中的结合模式。只有一些化合物对革兰氏阳性细菌具有弱的抗菌活性。这些结果为针对具有抗菌活性的双重DNA促旋酶和拓扑异构酶IV抑制剂的基于结构的优化提供了基础。