7-oxo-4-thia-1-aza[3,2,0]heptane and 7-oxo-4-thia-...

C - Chemistry – Metallurgy – 07 – D

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260/111

C07D 499/00 (2006.01) C07F 7/10 (2006.01)

Patent

CA 1197841

ABSTRACT OF THE DISCLOSURE 7-Oxo-4-thia-1-aza[3,2,0]heptane and 7-ozo-4-thia-1-aza- [3,2,0]hept-2-ene derivatives The invention relates to compounds of the formula Image in which R is an esterifying group R1 is lower alkyl or phenyl, and R2 is hydrogen, lower alkyl, lower hydroxyalkyl, lower alkoxy- alkyl, lower acyloxyalkyl or tri-lower alkylsilyloxyalkyl, and a process for their manufacture. Compounds of the general formula referred to above are useful in the synthesis of substituted penems, and useful as .beta. - lactomase inhibitors and antibacterial compounds.

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