Process for the preparation of the cephalosporanic acid derivati

Details Process for the preparation of the cephalosporanic acid derivati Process for the preparation of the cephalosporanic acid derivati

1973-12-19

1976-01-27

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

C07D50110

Patent

active

039351980

ABSTRACT:
A process for the preparation of cephalosporanic acid derivatives represented by the formula ##SPC1##
Wherein R.sub.1 and R.sub.2, which may be the same or different, each represents a univalent group other than a hydrogen atom, said R.sub.1 and R.sub.2 may be combined to form a divalent group and A represents a divalent group represented by the formulae ##SPC2##
Wherein R.sub.3 represents a hydrogen atom or a group which does not contribute to the reaction, which comprises heating a penicillin sulfoxide derivative represented by the formula ##SPC3##
Wherein R.sub.1, R.sub.2 and R.sub.3 are as defined above.
The cephalosporanic acid derivatives prepared by the process of this invention are useful as a starting material for the preparation of antibacterials.

REFERENCES:
patent: 3780028 (1973-12-01), Naito et al.
Spry, J. Am. Chem. Soc. 92(16), pp. 5006-5008 (8/12/70).

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