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.
The Use of Sulfur Ylides in the Synthesis of Substituted Indoles
作者:Abigail R. Kennedy、Michael H. Taday、Jon D. Rainier
DOI:10.1021/ol0162320
日期:2001.7.1
[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.