Process for the preparation of 1,1-dioxo-7-substituted cephems

Details Process for the preparation of 1,1-dioxo-7-substituted cephems Process for the preparation of 1,1-dioxo-7-substituted cephems

1989-08-01

1991-02-12

Rizzo, Nicholas S.

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

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

540215, 540230, 540222, C07D50104, A61K 31545

Patent

active

049925415

ABSTRACT:
The present invention relates to an improved process for the preparation of the compounds of formula (I) ##STR1## which involve the direct oxidation without N-protection of the compound of the formula (II) ##STR2##

REFERENCES:
patent: 4547371 (1985-10-01), Doherty et al.
Schultz, H. S., J. Org. Chem. 1963, 28, 1140.
Fieser and Fieser, M. Reagents for Organic Synthesis, Wiley, New York 1967, p. 475.
Kahr, K. et al., C. Chem. Ber. 1960, 13, 132.
Blacklock, T. J., J. Org. Chem., 1989, 54, p. 3909 at Scheme 1.

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