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SORAIN
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SORAIN
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Priority to FR7214889ApriorityCriticalpatent/FR2181504A1/en
Publication of FR2181504A1publicationCriticalpatent/FR2181504A1/en
C07D499/00—Heterocyclic compounds containing 4-thia-1-azabicyclo [3.2.0] heptane ring systems, i.e. compounds containing a ring system of the formula:, e.g. penicillins, penems; Such ring systems being further condensed, e.g. 2,3-condensed with an oxygen-, nitrogen- or sulfur-containing hetero ring
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Chemical & Material Sciences
(AREA)
Organic Chemistry
(AREA)
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Cephalosporin Compounds
(AREA)
Abstract
Title cpds. of formula: where - 6-APA is the 6-aminopenicillanic acid residue; R' is H, alkyl or phenyl; R2 is H, OH or phenyl are prepd. by conventional methods for semisynthetic penicillins, e.g. by reaction of 6-APA, phosgene and 4-aminobenzoic acids and their esters.
FR7214889A1972-04-261972-04-26Semisynthetic phenylureidopenicillins - with antibacterial activity
WithdrawnFR2181504A1
(en)
Process for the enzymatic hydrolysis of cephalosporins derived by chemical enlargening of the penicillin g ring and the enzymatic synthesis of semisynthetic cephalosporins