Investigation of nitrogen- and sulfur-containing heterocycles
Abstract5-Acylamino-6-acylmethylmercaptopyrimidines are formed by reaction of 5-amino-6-mercaptopyrimidines with halo-β-diketones in alkaline media, while 7-acylpyrimido[4,5-b]-[1, 4]thiazines are formed in close-to-neutral media.