Synthesis of pyrimidines from 2-trichloromethyl-4-dimethylamino-1,3-diaza-1,3-butadienes and electron deficient acetylenes
摘要:
2-Trichloromethyl-4-dimethylamino-1,3-diaza-1,3-butadienes(3), prepared from trichloroacetamidine(1) and amide acetals 2, readily react with electron deficient acetylenes 4 to give 2-trichloromethylpyrimidines 5.