BF3·OEt2-Mediated One Pot Synthesis of 10-Indolyldibenzo[b,f]azepine Derivatives via Tandem Ring Expansion and C—C Bond Formation.

A simple and efficient one pot protocol was developed for the synthesis of new structurally diverse 10-indolyldibenzo[b,f]azepine derivatives. The reaction involves Lewis-acid mediated ring expansion followed by C–C bond formation through nucleophilic addition of indole moiety.