Palladium-Catalyzed Coupling of 3-Indolyl Triflate. Syntheses of 3-Vinyl and 3-Alkynylindoles
作者:Gordon W. Gribble、Samuel C. Conway
DOI:10.1080/00397919208019065
日期:1992.8
Palladium-catalyzed coupling of 1 -(phenylsulfonyl)indol-3-yl trifluoromethanesulfonate (triflate) (1) with terminal alkenes and alkenes gives 3-vinyl (2) and 3-alkynylindoles in 45-93% yields. An attempt to generate 2,3-indolyne 22 from 2-trimethylsilyl-3-indolyl triflate 20 gives indigo (23).