Novel synthesis of di-imines by the transformation of 1-aryl-4,6-disubstituted pyrimidin-2(1H)-ones

Abstract

The di-imines (4), which are versatile starting materials for the synthesis of heterocycles, are obtained in fair yields when the 1-aryl-4,6-disubstituted pyrimidin-2(1H)-ones (3) are treated with alkoxide, both photochemically and thermally. The di-imines (4) thus obtained, when treated with carbon disulphide, give the 1,3-thiazine-2-thiones (8) and/or the 1-arylpyrimidine-2(1H)-thiones (9).