Process for preparing-3-methyl-4-(5-tetrazolyl)-a3-cephem...

Details Process for preparing-3-methyl-4-(5-tetrazolyl)-a3-cephem... Process for preparing-3-methyl-4-(5-tetrazolyl)-a3-cephem...

C - Chemistry, Metallurgy

07

D

260/100

C07D 501/10 (2006.01) C07D 499/00 (2006.01)

Patent

CA 1050010

ABSTRACT OF THE DISCLOSURE 6-Amino-2,2-dimethyl-3-(5-tetrazolyl)penam sulfoxides, 6-(N-protected amino)-2,2-dimethyl-3-(5-tetrazolyl)penam sulf- oxides and their direct conversion to 7-amino-3-methyl-4-(5-tetra- zolyl)-.DELTA.3-cephems and 7-(N-protected amino)-3-methyl-4-(5-tetra- zolyl)-.DELTA.3-cephems, useful antibacterial agents or intermediates for antibacterial agents, by heating under acid conditions, desirably in a liquid medium and especially one derived from a tertiary carboxamide, a tertiary urea derivative or a tertiary sulfonamide. The preparation of the tetrazolylpenam sulfoxide reactants is described.

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