C - Chemistry – Metallurgy – 07 – D
Patent
C - Chemistry, Metallurgy
07
D
260/103
C07D 501/24 (2006.01) C07F 7/18 (2006.01)
Patent
CA 1177065
ABSTRACT OF THE DISCLOSURE 3'-Bromo-substituted deacetoxycephalosporanic acid sulphoxide derivatives are prepared by silylating the carboxy group (in order to protect same) of a 3'-unsubstituted deacetoxycephalosporanic acid sulphoxide derivative in an inert anhydrous organic solvent, and then brominating the resulting silyl ester of the deacetoxycephalosporanic acid sulphoxide in situ.
370844
Bruynes Cornelis A.
Jurriens Theodorus K.
Gist - Brocades N.v.
Osler Hoskin & Harcourt Llp
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