4(Formylthio)-azetidin-2-ones and ozonization process therefor

Details 4(Formylthio)-azetidin-2-ones and ozonization process therefor 4(Formylthio)-azetidin-2-ones and ozonization process therefor

1975-10-29

1977-09-13

Daus, Donald G.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

26032637, 260326S, C07D20508

Patent

active

040481573

ABSTRACT:
Ozonolysis of 3-bromomethyl-2-cephem-4-carboxylic acid esters provides 1-(1-protected carboxy-2-hydroxy-3-bromo-1-propenyl)-3-amido(or imido)-4-formylthio-azetidin-2-ones, useful as intermediates in the preparation of cephalosporin antibiotics.

REFERENCES:
patent: 3950352 (1976-04-01), Wolfe
Bax et al., Rec. Trav. Chem. 89 260(1970).
Bailey et al., "Advances in Chemistry, No. 112" (ACS, 1972), pp. 53-54, 78-80, 101-102.

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