Visible-Light Photoredox-Catalyzed Sulfonyl Lactonization of Alkenoic Acids with Sulfonyl Chlorides for Sulfonyl Lactone Synthesis
作者:Wei-Hao Rao、Qi Li、Fang-Yuan Chen、Li-Li Jiang、Pan Xu、Xue-Wan Deng、Ming Li、Guo-Dong Zou、Xinhua Cao
DOI:10.1021/acs.joc.1c01378
日期:2021.9.3
A visible-light photoredox-catalyzed sulfonyl lactonization of unsaturated carboxylic acids with sulfonyl chlorides is described. This reaction features good functional group tolerance and a broad substrate scope, providing a simple and efficient protocol to access a wide range of sulfonyl lactones in high to excellent yields. Preliminary mechanistic investigations suggested that a free-radical pathway
An efficient enantioselective synthesis of 3,3-disubstituted phthalides possessing a chiral quaternary carbon center was achieved via catalytic asymmetric bromolactonization that utilized BINOL-derived bifunctional sulfide catalysts. Transformations of the bromo group in optically active phthalide products were also performed to demonstrate the utility of this novel synthetic protocol.
Photoredox-Catalyzed Acyl Lactonization of Alkenes with Aldehydes: Synthesis of Acyl Lactones
作者:Wei-Hao Rao、Qi Li、Li-Li Jiang、Ying-Ge Li、Pan Xu、Xue-Wan Deng、Ming Li、Guo-Dong Zou、Xinhua Cao
DOI:10.1021/acs.joc.2c01732
日期:2022.11.4
An acyl lactonization of alkenes with aldehydes under visible-light photoredox catalysis is described. With the protocol, a broad scope of alkenoic acids and aldehydes could be compatible and good functional group tolerance is obtained. A series of acyl lactones are obtained with isolated yields ranging from 50–95%. Mechanistic studies revealed that the transformation should proceed via a radical chain
Visible‐Light Photoredox‐Catalyzed Acyl Lactonization of Alkenes with Acyl Chlorides
作者:Wei‐Hao Rao、Qi Li、Ying‐Ge Li、Li‐Li Jiang、Ming‐Xiao Yue、Guo‐Dong Zou、Xinhua Cao
DOI:10.1002/ejoc.202300191
日期:2023.5.8
A photocatalytic acyl lactonization of alkenoic acids with simple and inexpensive acyl chlorides has been developed for a modular synthesis of acyl lactones. The protocol allows an efficient construction of biologically important phthalide framework, which features excellent yields, good functional group tolerance and broad substrate scope. Preliminary mechanistic investigations revealed that the transformation