ES445254A1 - A procedure for the preparation of 3-substitute methyl-2 or 3-cefem-4-carboxylic acids. (Machine-translation by Google Translate, not legally binding) - Google Patents

A procedure for the preparation of 3-substitute methyl-2 or 3-cefem-4-carboxylic acids. (Machine-translation by Google Translate, not legally binding)

Info

Publication number
ES445254A1
ES445254A1 ES445254A ES445254A ES445254A1 ES 445254 A1 ES445254 A1 ES 445254A1 ES 445254 A ES445254 A ES 445254A ES 445254 A ES445254 A ES 445254A ES 445254 A1 ES445254 A1 ES 445254A1
Authority
ES
Spain
Prior art keywords
procedure
salt
translation
preparation
carboxylic acids
Prior art date
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.)
Expired
Application number
ES445254A
Other languages
Spanish (es)
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Fujisawa Pharmaceutical Co Ltd
Original Assignee
Fujisawa Pharmaceutical Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Fujisawa Pharmaceutical Co Ltd filed Critical Fujisawa Pharmaceutical Co Ltd
Publication of ES445254A1 publication Critical patent/ES445254A1/en
Expired legal-status Critical Current

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Abstract

A procedure for the preparation of 3-substituted methyl-2 or 3-cephem-4-carboxylic acids of general formula: **(See formula)** where A is (see formula), R is hydrogen or acyl and R2 is a residue of a nucleophile, or a salt or ester thereof, the procedure of which is to react a compound of the general formula: **(See formula)** where A and R1 are each as defined above and X is a group convertible to a residue of a nucleophile, or a salt or ester thereof, with a nucleophile in water or in an organic solvent mixed with water, in the presence of a quaternary ammonium salt or a phosphonium salt and, if necessary, reduce the resulting compound when A in said compound is to obtain the group -S- and, if necessary, subject the resulting compound to an elimination reaction when Said resulting compound is a salt or ester to obtain the carboxy group. (Machine-translation by Google Translate, not legally binding)
ES445254A 1973-01-17 1976-02-17 A procedure for the preparation of 3-substitute methyl-2 or 3-cefem-4-carboxylic acids. (Machine-translation by Google Translate, not legally binding) Expired ES445254A1 (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP803673A JPS563874B2 (en) 1973-01-17 1973-01-17

Publications (1)

Publication Number Publication Date
ES445254A1 true ES445254A1 (en) 1977-10-01

Family

ID=11682101

Family Applications (1)

Application Number Title Priority Date Filing Date
ES445254A Expired ES445254A1 (en) 1973-01-17 1976-02-17 A procedure for the preparation of 3-substitute methyl-2 or 3-cefem-4-carboxylic acids. (Machine-translation by Google Translate, not legally binding)

Country Status (2)

Country Link
JP (1) JPS563874B2 (en)
ES (1) ES445254A1 (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH02138187U (en) * 1989-04-22 1990-11-19

Also Published As

Publication number Publication date
JPS4993388A (en) 1974-09-05
JPS563874B2 (en) 1981-01-27

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