Oxidation of thiourea and substituted thioureas: a review

Thioureas, containing sulfur and nitrogen atoms, are susceptible to oxidation by a large number of oxidants giving rise to various products including ureas, sulfides, oxides of sulfur, and nitrogen. Some novel cyclized products were also obtained during oxidation. The reaction conditions and types of oxidants steer the formation of different products. This review comprises basically the synthetic aspects, and the mechanism/schemes of the reactions discussed in the manuscript are based on stoichiometry and products of the reactions.