Carbo- and Heterocycle Syntheses via Reactions between Two Multiple Bonds; Involving Heteroatom-Substituted Unsaturated Bonds

Abstract

Cyclization reactions between two multiple bonds have been fascinating processes that allow the discovery of new reactions and the construction of carbo- and/or heterocycles. Among multiple bonds, heteroatom-substituted olefins have different reactivity from those having heteroatom on the allylic or homoallylic position, but the reactions have been reported few cases until the 2000s. Lately, the reactions between multiple bonds and heteroatom-substituted olefins have been reported, and this review explains them by the reaction class.