Oxacephalosporins

Details Oxacephalosporins Oxacephalosporins

1981-11-19

1983-01-25

Raymond, Richard

Harness for working animal

542420, 544 69, 544 90, C07D49804

Patent

active

043704786

ABSTRACT:
New oxacephalosporins of the general formula: ##STR1## in which either R.sub.1 is hydrogen or a protective radical, R.sub.4 is hydrogen or substituted 2-(2-aminothiazol-4-yl)-acetyl or .alpha.-carboxyarylacetyl, of which the amine and acid groups are free or protected, and R" is hydrogen or methoxy in the 7.alpha.-position, or R.sub.1 is a protective radical, R.sub.4 is a radical which can easily be removed and R" is hydrogen or methoxy in the 7.alpha.-position or hydrogen in the 7.beta.-position, and R.sub.2 is a radical --O SO.sub.2 --R.sub.3 or --O CO--R'.sub.3 (R.sub.3 and R'.sub.3 being substituted or unsubstituted alkyl radicals, or phenyl radicals) or a halogen atom, are useful as intermediates for the preparation of antimicrobial oxacephalosporins.

REFERENCES:
patent: 4143038 (1979-03-01), Narisada et al.
patent: 4201782 (1980-05-01), Narisada et al.
patent: 4304774 (1981-12-01), Katner

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