Divergent synthesis of N-alkyl-3-sulfonylindoles and N-alkyl-3-sulfanylindoles from 2-alkynyl-N,N-dialkylanilines and sulfonyl hydrazides has been described.
A Copper-Catalyzed Synthesis of 3-Aroylindoles via a sp<sup>3</sup> C–H Bond Activation Followed by C–C and C–O Bond Formation
作者:Anupal Gogoi、Srimanta Guin、Saroj Kumar Rout、Bhisma K. Patel
DOI:10.1021/ol400692b
日期:2013.4.19
An efficient Cu(I)-catalyzed synthesis of 3-aroylindoles has been achieved from o-alkynylated N,N-dimethylamines via a sp(3) C-H bond activation a to the nitrogen atom followed by an intramolecular nucleophilic attack with the alkyne using an aqueous solution of tert-butyl hydroperoxide (TBHP) as the oxidant. In this tandem catalytic synthesis of 3-aroylindoles both C-C and C-O bonds are installed at the expense of two sp(3) C-H bond cleavages.
Switchable Synthesis of 3-Cyanoindoles and 3-Amidylindoles<i>via</i>a Palladium-Catalyzed Reaction of<i>N</i>,<i>N</i>-Dimethyl-2-alkynylaniline with Isocyanide
AbstractA palladium‐catalyzed reaction of N,N‐dimethyl‐2‐alkynylanilines with isocyanides is reported, leading to the formation of 3‐cyanoindoles and 3‐amidylindoles. The isocyanide insertion is the key step during the process, and the presence of water is essential for the formation of 3‐amidylindoles.magnified image