Atroposelective formation of dibenz[c,e]azepines via intramolecular direct arylation with centre-axis chirality transfer

Org Biomol Chem. 2011 Mar 21;9(6):1831-8. doi: 10.1039/c0ob00889c. Epub 2011 Jan 26.

Abstract

5-Substituted 6,7-dihydrodibenz[c,e]azepines, a class of secondary amine incorporating a centre-axis chirality relay, are accessible from 1-substituted N-(2-bromobenzyl)-1-phenylmethanamines via N-acylation and ring-closing intramolecular direct arylation. The ring closure proceeds with high atropodiastereoselectivity due to strain effects that are induced by trigonalisation of the nitrogen atom, as predicted using molecular mechanics calculations.