申请人:Takasago International Corporation
公开号:US06407293B1
公开(公告)日:2002-06-18
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.
一种安全高效地生产高纯度3-1-薄荷氧丙基丙二醇的方法,以及用于该方法的中间体。通过将1-薄荷醇加入到一种有机溶剂中的1,2-环氧-3-卤代丙烷中(其中X代表卤素原子),在Lewis酸的存在下产生一种新的1-卤代-3-1-薄荷氧丙基丙醇,然后,在相转移催化剂的存在下,用碱对其进行环氧化,得到一种化学式为(III)的1,2-环氧-3-1-薄荷氧丙烷,然后进一步水解。