Reduction process for sulfoxides

Details Reduction process for sulfoxides Reduction process for sulfoxides

C - Chemistry, Metallurgy

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C07D 501/04 (2006.01) A61K 31/545 (2006.01) C07D 279/00 (2006.01) C07D 501/00 (2006.01) C07D 501/02 (2006.01) C07D 501/14 (2006.01) C07D 501/20 (2006.01) C07D 501/22 (2006.01) C07D 501/24 (2006.01) C07D 501/26 (2006.01) C07D 501/28 (2006.01) C07D 501/30 (2006.01) C07D 501/32 (2006.01) C07D 501/36 (2006.01) C07D 501/59 (2006.01) C07D 501/60 (2006.01)

Patent

CA 1075229

Abstract of the Disclosure Cephalosporin sulfoxides are reduced to the cor- responding cephalosporin with acyl bromides, e g., acetyl bromide, in the presence of a bromine scavenger, e.g., an olefin, acetylene, phenol, phenol ether, or an organophos- phite. For example, p-nitrobenzyl 7-phenoxyacetamido-3- methyl-3-cephem-4-carboxylate sulfoxide is reduced with acetyl bromide in the presence of amylene to p-nitrobenzyl 7-phenoxyacetamido-3-methyl-3-cephem-4-carboxylate.

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