.alpha.-(Etherified oximino) carboxylic acids and acid chlorides

Details .alpha.-(Etherified oximino) carboxylic acids and acid chlorides .alpha.-(Etherified oximino) carboxylic acids and acid chlorides

1975-09-30

1977-04-12

Schwartz, Gerald A.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

2602948R, 2602948C, 2602948D, 2602949, 260295CA, 260295AM, 260296AE, 260329HS, 260329S, 260329F, 260329AM, 2603305, 2603322A, 2603322C, 2603322R, 2603323P, 2603323H, 2603325, 2603462R, 2603472, 2603473, 2603474, 2603477, C07D33316

Patent

active

040175154

ABSTRACT:
.alpha.-(Etherified oximino)carboxylic acids, represented by the formula:- ##STR1## where R is hydrogen or an organic group having 1-20 carbon atoms and R.sup.a is an etherifying monovalent organic group having 1-16 carbon atoms linked to the oxygen atom through a carbon atom, and the corresponding acid chlorides, are useful intermediates in the preparation of highly active, highly .beta.-lactamase-stable 7.beta.-[.alpha.-(etherified oximino)acylamido]-ceph-3-em-4-carboxylic acid antibiotics. The compounds are syn isomers or exist as mixtures of syn and anti isomers containing at least 75% of the syn isomer.

REFERENCES:
patent: 3546219 (1970-12-01), Long et al.
patent: 3573294 (1971-03-01), Long et al.
Moses et al., Arkiv for Kemi, 22, No. 33 pp. 451-467 (1964).

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