Cu-OMS-2-catalyzed decarboxylation-acetoxylation of (3 R,4 R)-4-acid-3-[( R)-1-(( t-butyl-dimethylsilyl)oxy)-ethyl]-1-methoxyphenyl-2-azetidinone with NaBrO/NaOAc.

(3 R,4 R)-4-Acetoxy-3-[( R)-1(( t-butyldimethylsilyl)oxy)-ethyl]-1-methoxyphenyl-2-azetidinone (an important precursor for the synthesis of carbapenem antibiotics) was synthesized under mild and green conditions catalyzed by Cu-OMS-2. Normal to excellent isolated yields were obtained under given conditions. [ABSTRACT FROM AUTHOR]