Nucleophilic-type radical cyclizations of indoles: conversion of 2-cyano 3-substituted indoles to spiro-annelated indolines and tetrahydrocarbazolones
作者:Chau Chen Yang、Han Ting Chang、Jim Min Fang
DOI:10.1021/jo00063a032
日期:1993.5
Oxidative photocyclizations of appropriate 2-anilino alkenenitriles (6) afforded a series of indole-2-carbonitriles (7) having bromoalkyl substituents at the C-3 positions. Upon treatment with Bu3SnH, these indolecarbonitriles underwent intramolecular cyclizations either by attack at the C-3 positions of the indole rings to give the spiro-annelated indolinecarbonitriles or by attack at the cyano group to give carbazolone derivatives.