Photo‐Mediated Decarboxylative Ketonization of Atropic Acids with Sulfonyl Hydrazides: Direct Access to
<i>β</i>
‐Ketosulfones
作者:Jie Chen、Zoe G. Allyson、Jing‐Rui Xin、Zhi Guan、Yan‐Hong He
DOI:10.1002/adsc.201901525
日期:2020.5.12
synthetically and biologically relevant β‐ketosulfones via a photo‐mediated decarboxylative ketonization of atropic acids was disclosed. The approach features metal‐free conditions, good functional group compatibility, readily available starting materials and the use of ubiquitous dioxygen as both oxygen source and oxidant. Furthermore, mechanistic studies reveal that the decarboxylative ketonization
Copper-catalyzed aerobic oxidative cross-coupling reactions of vinylarenes with sulfinate salts: A direct approach to β-ketosulfones
作者:Yu Chen、Lei Xu、Biyu Wang、Jingjing Jiang、Yixiang Sun、Longchun Li
DOI:10.1016/j.tetlet.2020.152794
日期:2021.2
A copper-catalyzed aerobic oxidative cross-couplingreactions for the synthesis of β-ketosulfones via formation of a CS bond has been demonstrated. Promoted by the crucial copper catalyst, perfect selectivity and good to excellent yields could be achieved. This method, including inexpensive copper catalyst, wide functional group tolerance, and open air conditions, make it very attractive and practical
A practical synthesis of new β-difluoromethoxy vinylsulfones has been explored by O-difluoromethylation of β-ketosulfones using the inexpensive and easily workable sodium chlorodifluoroacetate as a difluorocarbene precursor. The strategy is convenient and regioselective, and features an adequate substrate scope and functional group tolerance.
The design, synthesis, and biological evaluation of beta-keto sulfones as 11 beta-HSD1 inhibitors and the mechanism of inhibition are described here. This class of compounds is not active against 11 beta-HSD2 and therefore may have therapeutic potential for metabolic syndrome and type 2 diabetes. (c) 2007 Elsevier Ltd. All rights reserved.