PROCEDEU DE PREPARARE A ACIZILOR 2-PIROLIDINO-5-OXO-8-ALCHIL-5,8-DIHIDRO-PIRIDO-(2,3-D)-PIRIMIDIN-6-CARBOXILICI

摘要

A B S T R A C T Valuable antibacterial 8-alkyl-5-oxo-5,8-dihydro-pyrido(2,3-d) pyrimidine-6-carboxylic acids, some of which are new compounds, are made from corresponding pyrimidines by a process involving condensation with an amino-ester, cyclization, halogenation, dehydrohalogenation, and saponification.