The rebirth of a new field: Asymmetric Organocatalysis. Thioureas as organocatalysts

Abstract

Catalytic enantioselective reactions have had a significant impact on the development of synthetic organic chemistry during the last 30 years. Among them, methods based exclusively on metal-free organic catalysts (organocatalysis) have achieved a great importance and they are becoming powerful tools in the construction of complex molecular skeletons. Therefore, the last few years have witnessed a spectacular advance in new organocatalytic methods, some of them are described in this review.