| 摘要 |
<p>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.</p> |
