Process for preparation of 7-alkoxy-3- chloromethylcephems

Details Process for preparation of 7-alkoxy-3- chloromethylcephems Process for preparation of 7-alkoxy-3- chloromethylcephems

C - Chemistry, Metallurgy

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C07D 501/24 (2006.01) A61K 31/545 (2006.01) C07D 501/00 (2006.01) C07D 501/04 (2006.01) C07D 501/18 (2006.01) C07D 501/28 (2006.01) C07D 501/32 (2006.01) C07D 501/34 (2006.01) C07D 501/57 (2006.01) C07D 501/60 (2006.01)

Patent

CA 1109459

Abstract of the Disclosure 7-Alkoxy-3-chloromethyl-3-cephems are provided by a novel process comprising reacting a 3-methylenecepham with an alkali metal salt of a lower primary alcohol in the presence of tert-butyl hypochlorite at a temperature ranging from -80°C. to 0°C. The 3-chloromethylcephems provided by this invention are useful intermediates for the preparation of known cephalosporin antibiotics.

271405

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