Seven-Membered Rings With Three Heteroatoms 1,2,5

Abstract

This article covers seven-membered heterocyclic systems with three heteroatoms in 1st, 2nd, and 5th positions of the ring and their aryl/heteroaryl-fused derivatives. It reviews the literature from 2007 to early 2020. Earlier literature data were systematically treated as primary subjects in Comprehensive Heterocyclic Chemistry III series. The central part of the work is devoted to N-, O-, S-containing heterocycles. The aim of this article is to give an overview of the diverse methodologies that have been reported on the chemistry and usage of the above-mentioned systems and their fused derivatives. In accordance with the type of heteroatom, we have divided the chapter into corresponding sections.