The invention relates to a new series of penicillin esters and salts thereof, to methods of their preparation and to intermediates in the production of the esters of the general formula ##STR1## in which R.sub.1 and R.sub.2 represent an alkyl radical having from 1 to 6 carbon atoms, a cycloalkyl or cycloalkylalkyl radical the cycloalkyl part having from 3 to 10 carbon atoms, or R.sub.1 and R.sub.2 together with the nitrogen atom represent a heterocyclic ring with from 4 to 8 carbon atoms; R.sub.3 represents radicals known from natural, biosynthetic, and semisynthetic penicillins; and pharmaceutically acceptable salts thereof. The new compounds are efficiently absorbed from the gastrointestinal tract and after the absorption they are rapidly transformed into the corresponding free penicillins and amidinopenicillanic acids, whereby a broad-spectrum infection can be combated.
本发明涉及一种新的
青霉素酯及其盐的系列,以及它们的制备方法和制备通式为##STR1##的酯的中间体,其中R.sub.1和R.sub.2代表具有1至6个碳原子的烷基基团,具有3至10个碳原子的环烷基或环烷基烷基基团,或R.sub.1和R.sub.2与氮原子一起代表具有4至8个碳原子的杂环环;R.sub.3代表从天然、
生物合成和半合成
青霉素中已知的基团;以及其药学上可接受的盐。这些新化合物从胃肠道高效吸收,吸收后迅速转化为相应的游离
青霉素和
氨基甲酸青霉素酸,从而可以对抗广谱感染。