Process for preparing 2,2-bishalomethylpenam derivatives

Details Process for preparing 2,2-bishalomethylpenam derivatives Process for preparing 2,2-bishalomethylpenam derivatives

C - Chemistry, Metallurgy

25

B

204/52.3

C25B 3/06 (2006.01) C07D 499/00 (2006.01)

Patent

CA 1246488

ABSTRACT OF THE DISCLOSURE: This invention provides a process for preparing a 2,2-bishalomethylpenam derivative represented by the formula Image (I) wherein R1 represents a lower alkyl group, aryl group, arylmethyl group, arylcarbonyl group or aryloxymethyl group, R2 represents a carboxyl-protecting group, X1 and X2 are the same or different and represent a halogen atom, the process being characterized in that a disulfide represented by the formula Image (II) wherein R1, R2 and X1 are as defined above and R3 repre- sents an aryl group or heterocyclic group is subjected to an electrolytic reaction in a solvent in the presence of a halogen acid and/or halogen salt.

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