Intermediates for preparing semi-synthetic cephalosporins and pr

Details Intermediates for preparing semi-synthetic cephalosporins and pr Intermediates for preparing semi-synthetic cephalosporins and pr

1975-07-28

1977-02-15

Rizzo, Nicholas S.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

424246, 2602391, 424271, C07D50118

Patent

active

040082261

ABSTRACT:
Phosphorylated penicillins and cephalsporins are described which are obtained by reacting a penicillin or cephalosporin with a trivalent or pentavalent phosphorus halide and treating the thus formed product sequently with an acid chloride, an alcohol and water to form a phosphorylated anhydride of a 6-aminopenicillanic acid or 7-aminocephalosporanic acid salt, respectively, and thereafter acylating the thus formed product and splitting off the carboxyl protective group to obtain the desired penicillin or cephalosporin compound.

REFERENCES:
patent: 3853860 (1974-12-01), Weir

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