Efficient synthesis of optically active β-hydroxy p-tolylsulfones with very high enantiomeric excess via CBS–oxazaborolidine-catalyzed borane reduction
摘要:
A simple, efficient synthesis of optically active beta -hydroxy p-tolylsulfones with > 99% e.e. by employing CBS oxazaboronlidene-catalyzed asymmetric borane reduction of beta -keto p-tolylsulfones using N-ethyl-N-iso-propylaniline-borane complex as the borane carrier has been established. (C) 2001 Elsevier Science Ltd. All rights reserved.
Efficient sulfonylation of ketones with sodium sulfinates for the synthesis of β-keto sulfones
作者:Siqi Deng、En Liang、Yinrong Wu、Xiaodong Tang
DOI:10.1016/j.tetlet.2018.09.049
日期:2018.10
The oxidative sulfonylation of ketones with sodium sulfinates as the sulfone source and DMSO as the oxidant is reported. A series of β-keto sulfones were obtained in good to excellent yields. The advantages of this efficient protocol include the low cost of DMSO and HBr, and a broad scope.
Metal-free TBAI-catalyzed oxidative Csp3S bond formation through Csp2Csp2 bond and S N bond cleavage: A new route to β-keto-Sulfones
作者:Yucai Tang、Ying Chen、Hui Liu、Min Guo
DOI:10.1016/j.tetlet.2018.09.005
日期:2018.10
oxidative conditions and the corresponding β-keto-sulfone compounds were obtained in moderate to good yields. Importantly, this transformation offered the first protocol for Csp3S bondformation by oxidative Csp2Csp2 bond cleavage in one step.
combination of o-iodoxybenzoic acid (IBX) and a catalytic amount of iodine is found to promote a facile one-pot deacylative sulfonylation reaction of 1,3-dicarbonylcompounds with sodium sulfinates to yield β-carbonyl sulfones. The present method provides the target products bearing a wide variety of functional groups in one step and in good yields. A combination of o-iodoxybenzoic acid (IBX) and a catalytic
An efficient electrochemical synthesis of β-keto sulfones from sulfinates and 1,3-dicarbonyl compounds
作者:Xiao-Jun Pan、Jian Gao、Gao-Qing Yuan
DOI:10.1016/j.tet.2015.06.063
日期:2015.8
An efficient electrochemical synthesis of β-keto sulfones from sulfinates and 1,3-dicarbonylcompounds has been developed. The present electrochemical route could afford the target products in high to excellent yields under mild conditions.
sulfonylation of silyl enol ethers with DABCO·(SO2)2 and thianthrenium salts is achieved, providing diverse β-keto sulfones in moderate to good yields. This protocol features easily accessible starting materials and good functional group compatibility, enabling the introduction of various functionalized sulfonyl groups into ketones. Furthermore, as one of the important industrial raw materials, methanol