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.
Manganese(III)-Mediated and -Catalyzed Decarboxylative Hydroxysulfonylation of Arylpropiolic Acids with Sodium Sulfinates in Water
作者:Yan-Shi Xiong、Jiang Weng、Gui Lu
DOI:10.1002/adsc.201701209
日期:2018.4.17
With water as both solvent and reactant, a novel manganese(III)‐mediated and ‐catalyzed synthesis of β‐ketosulfones through decarboxylative hydroxysulfonylation reactions of arylpropiolic acids with sodium sulfinates is described. This protocol has the advantages of mild reaction conditions, short reaction time, easy to handle reagents, purification simplicity, and being environmentally benign, which
the optimized reaction conditions. Mechanistic studies indicated that this transformation involved copper‐catalyzedNObond cleavage, activation of a vinyl sp2 CHbond, and CS bond formation. The oxime acetates act as both a substrate and an oxidant, thus the reaction needs no additional oxidants or additives.
Heterogeneous copper‐catalyzed oxidative coupling of oxime acetates with sodium sulfinates: An efficient and practical synthesis of β‐keto sulfones
作者:Jianhui Xia、Xue Huang、Shengyong You、Mingzhong Cai
DOI:10.1002/aoc.5001
日期:2019.8
An efficient and practical route to β‐keto sulfones has been developed through heterogeneous oxidativecoupling of oxime acetates with sodiumsulfinates by using an MCM‐41‐supported Schiff base‐pyridine bidentate copper (II) complex [MCM‐41‐Sb,Py‐Cu (OAc)2] as the catalyst and oxime acetates as an internal oxidant, followed by hydrolysis. The reaction generates a variety of β‐keto sulfones in good