Myxopyronin B analogs as inhibitors of RNA polymerase, synthesis and biological evaluation
摘要:
A series of myxopyronin B analogs has been prepared via a convergent synthetic route and were tested for in vitro inhibitory activity against DNA-dependent RNA polymerase and antibacterial activity against E. coli and S. aureus. The parent lead compound proved to be very sensitive to even small changes. Only the achiral desmethyl myxopyronin B (1a) provided enhanced potency. (C) 2004 Elsevier Ltd. All rights reserved.
Lewis acid-catalyzed oxidative rearrangement of tertiary allylic alcohols mediated by TEMPO
作者:Jean-Michel Vatèle
DOI:10.1016/j.tet.2009.11.104
日期:2010.1
Two methods for the oxidative rearrangement of tertiary allylic alcohols have been developed. Most of tertiary allylic alcohols studied were oxidized to their corresponding transposed carbonyl derivatives in excellent to fair yields by reaction with TEMPO in combination with PhIO and Bi(OTf)3 or copper (II) chloride in the presence or not of oxygen. Other primary oxidants of TEMPO such as PhI(OAc)2
Copper-Catalyzed Aerobic Oxidative Rearrangement of Tertiary Allylic Alcohols Mediated by TEMPO
作者:Jean-Michel Vatèle
DOI:10.1055/s-0029-1217545
日期:2009.8
A mild method for the oxidativerearrangement of tertiary allylic alcohols to β-substituted enones using a TEMPO/CuCl 2 system, in the presence of molecular sieves, is described. Depending on the substrate, CuCl 2 was used in either a catalytic amount under an oxygen atmosphere or stoichiometrically.
Highly stereoselective synthesis of a sex pheromone of the dry bean beetleCallosobruchus analis
作者:O. A. Pinsker、P. G. Tsiklauri、N. Ya. Grigor'eva
DOI:10.1007/bf02495308
日期:1999.7
Total synthesis of 3-methylhept-2(Z)-enoic acid, a sexpheromone of the dry bean beetleCallosobruchus analis, has been performed using a previously developed highly stereoselective method of the construction of disubstituted (Z)-methylolefins based on the higher thermodynamic stability of (E)-isomers of α,β-disubstituted acroleins.
A systematic structure–activityrelationshipstudy of the potent anticancer marine macrolide biselyngbyolide B has been accomplished. A total of 11 structural variants of the parent natural product, of which 2 are natural analogues, have been studied against a human colorectal carcinoma cell line. The requisite functional units of the parent molecule responsible for the cytotoxic activities have been
已经完成了强效抗癌海洋大环内酯双色内酯 B 的系统构效关系研究。已经针对人结直肠癌细胞系研究了母体天然产物的总共 11 种结构变体,其中 2 种是天然类似物。负责细胞毒活性的母体分子必需的功能单元已被公开。 Biselyngbyolide C是biselyngbyolide B的天然类似物之一,人们对其分子机制进行了深入研究。有趣的是,体外数据表明,动力相关蛋白 1 介导的线粒体裂变和活性氧产生的诱导,导致结肠癌细胞中 ASK1/P38/JNK 介导的细胞凋亡的激活,这是双色内酯 B 介导的重要途径细胞毒性。值得注意的是,这项研究揭示了大环内酯参与线粒体裂变,促进癌细胞凋亡,提供了新的见解。
Myxopyronin B analogs as inhibitors of RNA polymerase, synthesis and biological evaluation
作者:Thomas Doundoulakis、Alan X. Xiang、Ricardo Lira、Konstantinos A. Agrios、Stephen E. Webber、Wes Sisson、Robert M. Aust、Amit M. Shah、Richard E. Showalter、James R. Appleman、Klaus B. Simonsen
DOI:10.1016/j.bmcl.2004.08.045
日期:2004.11
A series of myxopyronin B analogs has been prepared via a convergent synthetic route and were tested for in vitro inhibitory activity against DNA-dependent RNA polymerase and antibacterial activity against E. coli and S. aureus. The parent lead compound proved to be very sensitive to even small changes. Only the achiral desmethyl myxopyronin B (1a) provided enhanced potency. (C) 2004 Elsevier Ltd. All rights reserved.