ES419803A1 - A procedure for the preparation of 3-alkyl-3-cefem-4-carboxylic acids. (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for the preparation of 3-alkyl-3-cefem-4-carboxylic acids. (Machine-translation by Google Translate, not legally binding)
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Fujisawa Pharmaceutical Co Ltd
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Fujisawa Pharmaceutical Co Ltd
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Publication of ES419803A1publicationCriticalpatent/ES419803A1/en
Pharmaceuticals Containing Other Organic And Inorganic Compounds
(AREA)
Abstract
A procedure for the preparation of 3-alkyl-3-cephem-4-carnoxylic acids of general formula: **(See formula)** where R1 is amino or substituted amino, R2 is carboxy or protected carboxy and R3 is lower alkyl, the procedure of which is to subject a compound of the general formula: **(See formula)** where R1, R2 and R3 are as defined above and X is the remainder of a thiolic compound HX, to a ring closure reaction in the presence of a condensing agent or a polar solvent. (Machine-translation by Google Translate, not legally binding)
ES419803A1972-11-271973-10-19A procedure for the preparation of 3-alkyl-3-cefem-4-carboxylic acids. (Machine-translation by Google Translate, not legally binding)
ExpiredES419803A1
(en)
A procedure for the preparation of new derivatives of 2-alkyl (bottom) -2 or 3-cefem-4-carboxylic acid. (Machine-translation by Google Translate, not legally binding)
Procedure for the obtaining of acid compounds 7 amino-3-cejem-3-ol-4-carboxilicos O-substitute. (Machine-translation by Google Translate, not legally binding)
Method of preparation of the compound of hydrain 1-acilo-1- (2-substitute ethyl) -2- (5-nitrofurururiliden) (Machine-translation by Google Translate, not legally binding)
A procedure for the preparation of new derivatives of 2-alkyl (bottom) -2 or 3-cefem-4-carboxylic acid. (Machine-translation by Google Translate, not legally binding)