Isothiocyanates. I. Addition of Urea to Aroyl Isothiocyanates and Conversion of the Monoadducts into Monothiobiuret, 4-Thioxo-1, 3, 5-triazin-2-ones and 1, 2, 4- …

MN Basyouni, AM El-Khamry

Index: Basyouni,M.N.; El-Khamry,A.-M. Bulletin of the Chemical Society of Japan, 1979 , vol. 52, p. 3728 - 3732

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Citation Number: 3

Abstract

The hitherto unknown 1-aroyl-2-thiobiurets were synthesized by addition of urea to aroyl isothiocyanates. Treatment of 1-benzoyl-2-thiobiuret with concentrated hydrochloric acid effected hydrolysis to monothiobiuret. On the other hand, treatment of 1-aroyl-2-thiobiurets with alkali gave 6-aryl-4-thioxo-1, 2, 3, 4 (or 2, 3, 4, 5)-tetrahydro-1, 3, 5-triazin-2-ones. Oxidation of the 1-aroyl-2-thiobiurets with hydrogen peroxide in the presence of ...