3-substituted-7-[5-substitute d-2-thiazolyl)amino]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-3-ene-2-carboxyl ic acid, diphenylmethyl esters
US4760140A · kind A · utility
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7Claims
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Key dates
| Filing date | Oct 20, 1986 |
| Grant date | Jul 26, 1988 |
| Priority date | — |
| Expiry date | Oct 20, 2006 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC07D499/00
- WIPO fieldOrganic fine chemistry
- WIPO sectorChemistry
Abstract
Compounds of the formula: ##STR1## wherein R.sub.1 is hydrogen, alkyl(C.sub.1 -C.sub.3), vinyl, acetyloxy or ##STR2## wherein R.sub.3 is hydrogen or alkyl(C.sub.1 -C.sub.6); R.sub.2 is hydrogen or diphenylmethyl and A is R.sub.4 --C, where R.sub.4 is acetyl or benzoyl, are useful as intermediates in the preparation of biologically active cephalosporin derivatives.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.