MAQUESTIAU, A.;VANDEN, EYNDE J. -J., TETRAHEDRON, 43,(1987) N 18, 4185-4193
作者:MAQUESTIAU, A.、VANDEN, EYNDE J. -J.
DOI:——
日期:——
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.
Synthesis of 5-amino-4,5-dihydropyrazolo [3,4-d] pyrimidin-4-ones and related isomeric systems
作者:A. Maqestiau、J.-J. Vanden Eynde
DOI:10.1016/s0040-4020(01)83460-8
日期:1987.1
Treatment of ethyl (heteroalkylidene)aminopyrazole-4-carboxylates with hydrazine hydrate generally provides a ready synthetic route to 5-amino-4, 5-dihydropyrazolo [3,4-d] pyrimidin-4-ones, although ethyl 5-[(dimethylamino) alkylidene]aminopyrazole-4-carboxylates are unreactive.