One-pot relay catalysis: Divergent synthesis of furo[3,4-: B] indoles and cyclopenta [b] indoles from 3-(2-aminophenyl)-1,4-enynols

Abstract

Described herein is an efficient divergent strategy for the synthesis of furo[3,4-b]indoles via a sequential Ag(i)/Bi(iii)/Pd(ii) catalysis and cyclopenta[b]indoles via a one-pot Ag(i)/Brønsted acid relay catalysis from 3-(2-aminophenyl)-4-pentenyn-3-ols, accessible in three simple steps from 2-aminobenzaldehydes.