Abstract
The aim of this paper is to present the synthesis and reactions of thiochroman-4-ones. These compounds are used as precursors for the synthesis of many heterocyclic rings. The reactions of thiochroman-4-ones are subdivided into groups that cover reactions yielding heterocycles such as pyrazoles, imidazoles, thiazoles, indoles, pyridines, pyrimidines, and thiazepines.