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Beecham Research Laboratories Ltd
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Beecham Research Laboratories Ltd
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Publication of ES270875A1publicationCriticalpatent/ES270875A1/en
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Abstract
Process for the preparation of penicillins of the formula ** formula ** And its non-toxic salts, in which formula R1 is alkyl or alkeline, aralkyl, dicloexyl or straight chain alkyl terminated by a heterocyclic ring system when R2 is hydrogen, or each one of R1 and R2 can be alkyl, alkenyl or aryl or R1 and R2 together with the nitrogen atom to which they are attached form a heterocyclic ring system, which can be replaced with lower alkenyl groups and can have a benzene ring fused thereto, whose process is characterized in that 6-aminopenicillanic acid or a liquor containing it is reacted with an acid chloride of formula ** formula ** OR with a functional equivalent thereof. (Machine-translation by Google Translate, not legally binding)
ES270875A1960-10-141961-10-02Process for the preparation of formula penicillin .. (Machine-translation by Google Translate, not legally binding)
ExpiredES270875A1
(en)
A procedure for the preparation of new derivatives of acid2,3-alquilen (lower) penam-3-carboxylic. (Machine-translation by Google Translate, not legally binding)