Rhodium(I)-Catalyzed Addition of Arylboronic Acids to (Benzyl-/Arylsulfonyl)acetonitriles: Efficient Synthesis of (<i>Z</i>)-β-Sulfonylvinylamines and β-Keto Sulfones
An efficient rhodium(I)-catalyzed addition of arylboronic acids to (benzyl-/arylsulfonyl)acetonitrile is described. Novel β-sulfonylvinylamine products are formed in a stereoselective fashion (Z-alkene). Upon hydrolysis, useful β-keto sulfones are obtained with a broad scope of aryl and sulfonyl substituents.
reaction of aryldiazonium tetrafluoroborates and sulfur dioxide with silyl enolether under catalyst‐ and additive‐free conditions has been realized. This reaction proceeds efficiently at roomtemperature and goes to completion in half an hour. During the reaction process, aryldiazonium tetrafluoroborate is treated with DABCO⋅(SO2)2 (DABCO=1,4‐diazabicyclo[2.2.2]octane) to provide a sulfonyl radical as
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.
Chitosan-modified hetero-aromatic β-ketosulfones for iron(III) sensing and biological applications
作者:Zahra M. Al-amshany、KhalidA. Alamry、Reda M. El-Shishtawy、Mahmoud A. Hussein