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.
有价值的抗菌8-烷基-5-氧代-5,8-二氢-
吡啶(2,3-d)
嘧啶-6-
羧酸,其中一些是新的化合物,通过将相应的
嘧啶与
氨基酯缩合,环化,卤代,脱卤化和皂化等过程制备而成。