A ring-closing metathesis approach to heterocycle-fused azepines

Heterocycle-fused azepines, an important class of molecular scaffold, are readily synthesised through the ruthenium-catalysed ring-closing metathesis reaction. Although benzo-fused azepines are well documented, heterocycle-fused examples are poorly developed. Herein, a range of five- and six-membered heterocycle-fused azepines are investigated, allowing access to a series of pharmaceutically interesting products.