Process for the synthesis [R-(R*-,R*-)]-5-(3-chlorophenyl-3-[2-(3,4-dihydroxyphenyl)-1-methylethyl]-2-oxazolidinone

摘要

The invention is the simultaneous addition of boron tribromide and a solution of [R-(R*,R*)]-5-(3-chlorophenyl-3-[2-(3,4-dimethoxyphenyl)-1-methylethyl]-2-oxazolidinone in methylene chloride to methylene chloride while maintaining a constant ratio of 2.10:1.00 of boron tribromide to the substrate [R-(R*,R*)]-5-(3-chlorophenyl-3-[2-(3,4-dimethoxyphenyl)-1-methylethyl]-2-oxazolidinone at a temperature of -5 DEG C. to 10 DEG C. gives [R-(R*,R*)]-5-(3-chlorophenyl-3-[2-(3,4-hydroxyoxyphenyl)-1-methylethyl]-2-oxazolidinone in an isolated yield of 86.7% and a purity of 98.7%.