A. Couture et al., AN EXPEDITIOUS SYNTHESIS OF 3-ALKYL-INDOLES, ARYL-INDOLES AND HETEROARYL-INDOLES BY WAY OF AN INTRAMOLECULAR HORNER-WITTIG REACTION, Journal of the Chemical Society. Perkin transactions. I, (20), 1993, pp. 2463-2466
A variety of 3-alkyl-, aryl- and heteroaryl-indoles have been efficien
tly prepared by base-induced intramolecular cyclization of suitable ar
omatic o-acyl substituted Horner-Wittig reagents.