Preparation of 2,5-disubstituted pyrimidines from vinamidinium salts and synthesis of novel disulfane derivatives
Novel pyrimidine derivatives were prepared from the reaction of 2-substituted 1,3-bis(dimethylamino)-trimethinium salts with thiourea or guanidine in the presence of ethyl-diisopropylamine in ethanol at reflux, and also some 5-substituted pyrimidine-2-thi
