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Photoredox Catalytic Phosphite‐Mediated Deoxygenation of α‐Diketones Enables Wolff Rearrangement and Staudinger Synthesis of β‐Lactams
Author(s) -
Yang Hui,
Li Haijun,
Wei Guo,
Jiang Zhiyong
Publication year - 2021
Publication title -
angewandte chemie international edition
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 5.831
H-Index - 550
eISSN - 1521-3773
pISSN - 1433-7851
DOI - 10.1002/anie.202107080
Subject(s) - deoxygenation , chemistry , wolff rearrangement , catalysis , photoredox catalysis , thio , staudinger reaction , combinatorial chemistry , aryl , photochemistry , organic chemistry , photocatalysis , alkyl , ketene
A novel visible‐light‐driven catalytic activation of C=O bonds by exploiting the photoredox chemistry of 1,3,2‐dioxaphospholes, readily accessible from α‐diketones and trialkyl phosphites, is reported. This mild and environmentally friendly strategy provides an unprecedented and efficient access to the Wolff rearrangement reaction which traditionally entails α‐diazoketones as precursors. The resulting ketenes could be precisely trapped by alcohols/thiols to give α‐aryl (thio)acetates and by imines to afford the valuable β‐lactams in up to 99 % yields.