1260149-75-4Relevant academic research and scientific papers
Synthesis of β-Keto Sulfones by a Catalyst-Free Reaction of Aryldiazonium Tetrafluoroborates, Sulfur Dioxide, and Silyl Enol Ethers
Liu, Tianshuo,Zheng, Danqing,Ding, Yechun,Fan, Xiaona,Wu, Jie
supporting information, p. 465 - 469 (2017/02/23)
A green approach for the generation of β-keto sulfones through a reaction of aryldiazonium tetrafluoroborates and sulfur dioxide with silyl enol ether under catalyst- and additive-free conditions has been realized. This reaction proceeds efficiently at room temperature 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 key intermediate, which then initiates the transformation. Oxidants or metal catalysts are avoided, and the presence of DABCO also plays an important role in the reaction.
Rhodium(I)-catalyzed addition of arylboronic acids to (benzyl-/ arylsulfonyl)acetonitriles: Efficient synthesis of (Z)-β- sulfonylvinylamines and β-Keto sulfones
Tsui, Gavin Chit,Glenadel, Quentin,Lau, Chan,Lautens, Mark
, p. 208 - 211 (2011/03/19)
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.
