Process for producing 3-l-menthoxypropane-1,2-diol

Details Process for producing 3-l-menthoxypropane-1,2-diol Process for producing 3-l-menthoxypropane-1,2-diol

C - Chemistry, Metallurgy

07

C

C07C 43/196 (2006.01) C07C 41/03 (2006.01) C07C 43/188 (2006.01) C07D 303/22 (2006.01) C07D 303/24 (2006.01)

Patent

CA 2358617

A process for producing highly pure 3-1- menthoxypropane-1,2-diol safely and efficiently, and an intermediate to be used in the process 3-1- menthoxypropane-1,2-diol represented by the chemical formula (IV) is produced by adding 1-menthol to a 1,2- epoxy-3-halogenopropane represented by the following general formula (I) (wherein X represents a halogen atom) in an organic solvent in the presence of a Lewis acid to produce a novel 1-halogeno-3-1-menthoxypropan-2-ol represented by the following general formula (II), then, epoxidating it with a base in the presence of a phase transfer catalyst to produce a 1,2-epoxy-3-1- menthoxypropane represented by the chemical formula (III), and further hydrolyzing it. -43-

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