Abstract β-Keto-β-sulfonylenamines 2a, b reacted with benzamidine or guanidines to give 2, 4-disubstituted 5-methanesulfonylpyrimidines 3a-d, whose methanesulfonyl groups were substituted by n-butyllithium or alkylmagnesium bromides to yield 2, 4-disubstitued 5- alkylpyrimidines 6a-d. 2-Substituted 4-amino-5-sulfonylpyrimidines 7a, b, 8 and 2- substituted 5-benzenesulfonylpyrimidin-4-ones 9a, b were similarly obtained from β-cyano ...
