Three-component cyclocondensations. A convenient access to fused imidazolium and dihydropyrimidinium salts via the reaction of methyl chlorothioimidates with azines and isocyanides.
作者:Evelyne Marchand、Georges Morel
DOI:10.1016/s0040-4039(00)77603-9
日期:1993.4
and pyrinidine react in a sequence of N-imidoylpyridinium formation then cycloaddition step, to give 1-amonoimidazo [1,5-a] pyridazine, pyrimidine and pyrazine allows the preparation of corresponding fused 1 -amino-3-(methylthio) imidazolium chlorides.
氯硫代亚氨酸甲酯,异氰酸酯和嘧啶的混合物按N-亚氨基吡啶鎓的形成顺序反应,然后环加成步骤,得到1-单咪唑并[1,5-a]哒嗪,嘧啶和吡嗪,可以制备相应的稠合1-氨基-3 -(甲硫基)咪唑鎓氯化物。