Electrochemical Direct Thiolation of Lactams with Mercaptans: An Efficient Access to
<i>N</i>
‐Acylsulfenamides
作者:Zhaoxin Wei、Renjie Wang、Yonghong Zhang、Bin Wang、Yu Xia、Ablimit Abdukader、Fei Xue、Weiwei Jin、Chenjiang Liu
DOI:10.1002/ejoc.202100924
日期:2021.9.7
A variety of N-acylsulfenamides are produced by the electrochemically enabled cross-coupling of readily available feedstocks under standard conditions. This protocol is practical and has wide substrate scope with good reaction efficiency (38 examples, up to 97 % yield). A possible free radical mechanism is preliminarily demonstrated.
Oxidative cross-coupling of two thiols is the most direct tool for the synthesis of unsymmetrical disulfides and highly desirable across academia and industry. However, the inevitable formation of significant amounts of the corresponding symmetrical by-products is a major issue. We herein present a method toward the synthesis of unsymmetrical disulfides in which the homo-coupling of the thiols is effectively
Design, synthesis and biological evaluation of sulfenimine cephalosporin sulfoxides as β-lactamase inhibitors
作者:Kai Zhang、Huai-Wei Ding、Hao Ju、Qi Huang、Li-Juan Zhang、Hong-Rui Song、De-Cai Fu
DOI:10.1016/j.cclet.2015.04.025
日期:2015.6
A series of sulfenimine cephalosporin sulfoxide derivatives (7a-v) were designed, synthesized and evaluated for their inhibitory activity against TEM-1 and cephalosporinase in cell-free systems. Some of the tested compounds showed enhanced inhibitory activity against class C beta-lactamase cephalosporinase compared with the tazobactam. The most promising compounds 7c and 7n (IC50 = 7.6 and 8.6 mu mol/L, respectively) were further investigated in combination with cefradine against a variety of clinical isolated beta-lactamase-producing bacterial strains. (C) 2015 Chinese Chemical Society and Institute of Materia Medica, Chinese Academy of Medical Sciences. Published by Elsevier B.V. All rights reserved.
The production of episulfonium complexes from propylene and the regioselectivity of their reactions with nucleophiles
作者:A. S. Gybin、M. Z. Krimer、V. A. Smit、V. S. Bogdanov、�. A. Vorob'eva