The Use of Sulfur Ylides in the Synthesis of Substituted Indoles
摘要:
[GRAPHICS]This letter describes the insertion of rhodium carbenoids into thioindoles, C-10 thioindoles undergo fragmentation-coupling reactions when exposed to rhodium carbenoids. In an analogous fashion, ketoester- and malonate-substituted carbenoids have been found to insert into C-2 thioindoles, In contrast, vinylogous carbenoids were found to alkylate C-2 thioindoles at C-3.
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.
An isonitrile-alkyne cascade to di-substituted indoles
作者:Jon D. Rainier、Abigail R. Kennedy、Eric Chase
DOI:10.1016/s0040-4039(99)01169-7
日期:1999.8
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.