A process for the obtaining of 6-benzoyl-7- (3-carbetoxipropil) -2-phenyl-3-oxo- (3ah) -4,5,6,7-tetrahydropirazolo (3,4-c) -piridine. (Machine-translation by Google Translate, not legally binding)

摘要

A process for the preparation of 6-benzoyl-7- (3-carbethoxypropyl) -2-phenyl-3-oxo [3ah] -4,5,6,7-tetrahydropyrazolo [3,4-c] pyridine of formula i, characterized in that it is made *** see image 01 react ethyl (II) *** 1-benzoyl-4-carbethoxy-3-oxo-2-piperidine propionate *** see image 02 at reflux temperature in the presence of phenylhydrazine with which precipitates in compound i which is recrystallized from ethanol. (Machine-translation by Google Translate, not legally binding)