Bis-tetrazolmethyl substituted .beta.-lactam antibiotics

Drug – bio-affecting and body treating compositions – Antigen – epitope – or other immunospecific immunoeffector – Bacterium or component thereof or substance produced by said...

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42424852, 542418, 544 90, A61N 31535, C07D49804

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active

043047742

ABSTRACT:
Broad spectrum .beta.-lactam antibiotics represented by the formula ##STR1## wherein R is the residue of a carboxylic acid, R.sub.2 is H or OCH.sub.3, and R.sub.4 is hydrogen or C.sub.1 -C.sub.3 alkyl; are obtained by reacting a 7-acylamino-3-halomethyl-1-oxa-.beta.-lactam ester with the desired 1- or 2-tetrazolemethyl substituted 1H or 2H tetrazole-5-thiol. Alternatively, a 7-amino-3-halo-methyl-1-oxa-.beta.-lactam ester is first reacted with the bis-tetrazole thiol and then the product is N-acylated with the desired carboxylic acid.

REFERENCES:
patent: 4138486 (1979-02-01), Narisada et al.
patent: 4226866 (1980-10-01), Christensen et al.
patent: 4232151 (1980-11-01), Nagata et al.

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