6-(substituted methylene) penems and intermediates

Details 6-(substituted methylene) penems and intermediates 6-(substituted methylene) penems and intermediates

1995-05-24

2000-03-14

Ford, John M.

Organic compounds -- part of the class 532-570 series

Organic compounds

Chalcogen in the nitrogen containing substituent

548154, C07D51304

Patent

active

060374691

ABSTRACT:
Compounds of formula (I) in which: R.sup.1 is hydrogen or an organic substituent group; R.sup.2 is a fused bicyclic heterocyclic ring system of general formula (a) wherein R.sup.4 and R.sup.5 are independently hydrogen or one or more substituents replacing hydrogen atoms in the ring system shown; m is 2 or 3; p is 0, 1 or 2; and R.sup.3 is hydrogen, a salt-forming cation or an ester-forming group; and the symbol .dbd./.dbd. indicates that the double bond may be in either the E or Z configuration

REFERENCES:
patent: 2541924 (1951-02-01), Jones
patent: 4137320 (1979-01-01), Tedeschi
patent: 5602250 (1997-02-01), Broom et al.
Fryberg, M. Chemical Abstract No. 94:74658, the Abstract of DE 2949167 (Jun. 1980), via STN (1981).

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