unprecedented radical difluoromethylarylation reaction of alkynes has been developed by discovering a new difluoromethylation reagent, CF2HSO2NHNHBoc. This air-stable and solid reagent can be prepared in one step from commercially available reagents CF2HSO2Cl and NH2NHBoc. The CF2H radical, generated through ferrocene-mediated electrochemical oxidation, participates in an unexplored alkyne addition reaction
A New Route to Indolines by the Cu-Catalyzed Cyclization Reaction of 2-Ethynylanilines with Sulfonyl Azides
作者:Eun Jeong Yoo、Sukbok Chang
DOI:10.1021/ol800049b
日期:2008.3.1
It is revealed that 2-sulfonyliminoindolines can be efficiently synthesized by the Cu-catalyzed cyclization reaction of N-alkyl- or aryl-substituted 2-ethynylanilines with sulfonyl azides. This newroute to the indoline derivatives is characterized by mild reaction conditions, facile introduction of functional groups at the 2-position of the indoline ring, and the wide substrate scope. Selective transformation
Palladium-Catalyzed Synthesis of 3-Haloindol-2-amines from 3-Diazoindolin-2-imines and Alkyl Halides
作者:Yuxuan Zhou、Zhenmin Li、Fanghui Ma、Chang Zhao、Ping Lu、Yanguang Wang
DOI:10.1021/acs.joc.9b00191
日期:2019.6.7
Synthetically valuable 3-haloindol-2-amines were prepared from readily available 3-diazoindolin-2-imines and a variety of alkylhalides through the palladium-catalyzed reaction. The broad substrate scope of both diazo compounds and alkylhalides, mild reaction conditions, and high efficiency are the main characters of this method. The synthesized 3-haloindol-2-amines can be conveniently transformed
Preparation of spiro[imidazolidine-4,3′-indolin]-2′-imines <i>via</i> copper(<scp>i</scp>)-catalyzed formal [2 + 2 + 1] cycloaddition of 3-diazoindolin-2-imines and triazines
作者:Yuxuan Zhou、Fanghui Ma、Ping Lu、Yanguang Wang
DOI:10.1039/c9ob01767d
日期:——
We report a facile and efficient synthesis of spiro[imidazolidine-4,3′-indolin]-2′-imines via a copper(i)-catalyzed cascade reaction of 3-diazoindolin-2-imines with 1,3,5-triazines.
Novel synthesis of oxindoles from carbamoyl chlorides via palladium catalysed cyclisation–anion capture
作者:Mark R. Fielding、Ronald Grigg、Christopher J. Urch
DOI:10.1039/b006765m
日期:——
The synthesis of 3,3-disubstituted and 3-methyleneoxindoles by
palladium(0) catalysed cyclisation of carbamoyl chlorides onto
proximate alkene or alkyne groups has been achieved in good yields.