Process for preparing azetidinones

Details Process for preparing azetidinones Process for preparing azetidinones

C - Chemistry, Metallurgy

07

D

260/335.5

C07D 205/08 (2006.01) C07F 7/10 (2006.01)

Patent

CA 1325638

ABSTRACT "PROCESS FOR PREPARING AZETIDINONES" Process for preparing compounds according to formula (I) Image (I) wherein R1 and R2 represent a hydrogen atom or a protective group and R3 represents a C1-C10 alkyl or an aryl group, by oxidation of compounds according to formula (II) Image (II) wherein R1, R2 and R3 have the above-mentioned meanings, in a two-phase system comprising: a) an organic phase including a 4-acylazetidinone compound (II) and an "onium" salt dissolved in a medium immiscible with water, b) an aqueous solution including an alkali or alkaline-earth metal salt of an organic or inorganic peracid. 4-Acyloxyazetidinones (I) are useful intermediates in the synthesis of anti-bacterial compounds.

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