Synthesis of 5-amino-4, 5-dihydropyrazolo [3,4-d] pyrimidin-4-ones and related isomeric systems
作者:A. Maquestiau、J.-J. Vanden Eynde
DOI:10.1016/s0040-4020(01)83459-1
日期:1987.1
Reactions between aminopyrazole-4-carboxylic acids derivatives and orthoesters or amide acetals lead, in most cases, to the introduction of a heteroalkylidene moiety on the amino group of ethyl aminopyrazole-4-carboxylates and on the β-hydrazide nitrogen atom of aminopyrazole-4-carboxhydrazides.
在大多数情况下,氨基吡唑-4-羧酸衍生物与原酸酯或酰胺缩醛之间的反应导致在氨基吡唑-4-羧酸乙酯的氨基上和氨基吡唑-4的β-酰肼氮原子上引入杂亚烷基部分-羧酰肼。