Newradical annulation reactions are described involving addition of cyano-substituted alkyl and sulfanyl radicals to aromatic isonitriles. The tandemcyclisation of the resulting imidoyl radicals onto the cyano group affords cyclopenta- and thienoquinoxalines, respectively. The intervention of the isonitriles in the aromatisation process of the cyclohexadienyl radicals is discussed, as well as the
Transformations of Isonitriles with Bromoalkanes Using Photoredox Gold Catalysis
作者:Samantha Rohe、Terry McCallum、Avery O. Morris、Louis Barriault
DOI:10.1021/acs.joc.8b01380
日期:2018.9.7
Recently, photoredox catalysis has emerged as a powerful tool for the construction of C–C bonds with few protocols for alkylative heterocycle synthesis through isonitrile addition. Herein, we describe the photocatalytic generation of alkyl radicals from unactivated bromoalkanes as part of an efficient cross-coupling strategy for the diversification of isonitriles using a dimericgold(I) photoredox catalyst