Heterocyclic studies. Part VII. Action of methoxyamine and methylhydrazines on 4-hydroxypteridine and its methyl derivatives
作者:Jim Clark、G. Neath、C. Smith
DOI:10.1039/j39690001297
日期:——
with 4-hydroxypteridine and its 2-methyl derivative to give mixtures of an aminopyrazine carboxamide (III; R2= R3= H), an aminopyrazine carbohyrazide (IVb; R2= R3= H), and 4,5-diamino-6-hydroxypyrimidine (IX; R1= H or Me). The 6- and 7-methyl and 6,7- and 2,7-dimethyl derivatives of 4-hydroxypteridine gave analogous products except that no pyrimidine derivative was obtained in these cases. Methylhydrazine
不对称二甲基肼与4-羟基蝶啶及其2-甲基衍生物反应生成氨基吡嗪羧酰胺(III; R 2 = R 3 = H),氨基吡嗪羧酰肼(IVb; R 2 = R 3 = H)和4的混合物5-二氨基-6-羟基嘧啶(IX; R 1= H或Me)。4-羟基蝶啶的6-和7-甲基和6,7-和2,7-二甲基衍生物得到类似的产物,不同的是在这些情况下没有得到嘧啶衍生物。甲基肼类似地降解4-羟基蝶啶。