ES483796A1 - A procedure for the preparation of penam-3-carboxylic acid derivatives. (Machine-translation by Google Translate, not legally binding)
- Google Patents
A procedure for the preparation of penam-3-carboxylic acid derivatives. (Machine-translation by Google Translate, not legally binding)
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Pfizer Inc
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Pfizer Inc
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Publication of ES483796A1publicationCriticalpatent/ES483796A1/en
Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
Y02P20/00—Technologies relating to chemical industry
Y02P20/50—Improvements relating to the production of bulk chemicals
Y02P20/55—Design of synthesis routes, e.g. reducing the use of auxiliary or protecting groups
Abstract
A procedure for the preparation of penam-3-carboxylic acid derivatives of formula-01: ** (Formula-01) ** where R2 and R3 are each hydrogen or methyl, provided that they are not both methyl and R is hydrogen or an M moiety, said M moiety being selected from the group consisting of 3-phthalidyl, 4-crotonolactonyl, gamma-butyrolacton-4-yl or a group of formula-02: ** (Formula-02) ** in which R4 and R5 are each hydrogen or alkyl of 1 to 2 carbon atoms; R6 is alkyl of 1 to 6 carbon atoms; whose procedure comprises: a) subjecting to deprotection reaction a compound of formula-03: ** (Formula-03) ** where R1 is a protecting group; b) if desired, form the salt of the compound obtained in the previous step and react it with a compound of formula M-Q, where M is the one defined above and Q is a halogen atom (Machine-translation by Google Translate, not legally binding)
ES483796A1979-08-311979-08-31A procedure for the preparation of penam-3-carboxylic acid derivatives. (Machine-translation by Google Translate, not legally binding)
ExpiredES483796A1
(en)
Novel 2-arylamino-hexahydropyrimidines and -imidazolidines, salts and complexes thereof, method of preparing the novel compounds and fungicidal compositions which contain the novel compounds.
Procedure for the preparation of eteres and ketones 2-carbalcoxyamino-bencimidazolil-5 (6) -fenilicos substituted with basic radicals. (Machine-translation by Google Translate, not legally binding)