As part of an ongoing lead discovery project we have developed a convenient
method for the modification and substitution of indole moieties at the 3-p
osition. Selective bromination of three different 2-carboxyindoles was foll
owed by Suzuki cross-coupling with aryl and heteroaryl boronic acids on a M
errifield resin solid-phase. After column chromatography, yields of the 3-
substituted indoles ranged from 42-98%.