How is (+)-Menthyl Chloroformate (CAS: 7635-54-3) typically synthesized?

(+)-Menthyl Chloroformate can be synthesized by the reaction of (−)-menthol with thionyl chloride and subsequent reaction with chloroform. Commonly, thionyl chloride is used to convert menthol to its chloride derivative, which is then reacted with chloroform in the presence of a base or catalyst to form the chloroformate. The process involves selective esterification and can yield up to 95% purity with good yield and selectivity.