作者:K.M. Doyle、F. Kurzer
DOI:10.1016/0040-4020(76)88013-1
日期:1976.1
interaction of amidrazones and isocyanate esters in dimethylformamide produces good yields of 4-substituted -1-imidoylsemicarbazides. They are unaffected by acids, but are cyclised to 3-alkyl (or aryl)-1,2,4-triazol-3-ones or their 4-substituted analogues in alkaline media. Analogous linear adducts arising in good yields from amidrazones and ethoxycarbonyl isothiocyanates are cyclised to 3-substituted
在二甲基甲酰胺中酰氨基zone和异氰酸酯的相互作用产生了4-取代的-1-亚氨基酰氨基脲的良好产率。它们不受酸的影响,但是在碱性介质中被环化成3-烷基(或芳基)-1,2,4-三唑-3-或它们的4-取代的类似物。由胺和乙氧基羰基异硫氰酸酯以高收率产生的类似线性加合物,被酸环化成3-取代的5-乙氧基碳酰胺基-1,3,4-噻二唑,但被碱裂解成小片段。