An isonitrile-alkyne cascade to di-substituted indoles
摘要:
Intramolecular tin and sulfur mediated free-radical cyclizations between an aryl isonitrile and a pendant TMS-substituted alkyne give 2,3-disubstituted indoles from 5-exo-dig cyclization and nucleophilic trapping of the resulting indolenine intermediate. (C) 1999 Elsevier Science Ltd. All rights reserved.
This paper describes the synthesis of dithioindoles from the free-radical cyclizations of arylisonitriles having pendant alkynes. Also described is the synthesis of substituted indoles and spiro-fused indoles from the coupling of dithioindoles with active hydrogen-containing compounds.
Synthesis of (Indol-3-ylmethyl)trimethylsilanes by Means of Alumina-Mediated Alkylation of Indoles with α-Chloro-α-silylsulfides
作者:Hiroyuki Ishibashi、Kayo Nishida、Masazumi Ikeda
DOI:10.1080/00397919308011123
日期:1993.9
Treatment of a mixture of indoles and alpha-chloro-alpha-silylsulfide 6 with neutral chromatographic alumina afforded the aromatic substitution products 8, which were desurfurized with Bu3SnH and AIBN to give (indol-3-ylmethyl)trimethylsilanes 9.