申请人:Takasago International Corporation
公开号:US20020156327A1
公开(公告)日:2002-10-24
A method for safely and efficiently producing high purity 3-l-menthoxypropane-1,2-diol and intermediates to be used in the method. As shown in the following reaction formula, 3-l-menthoxypropane-1,2-diol represented by the chemical formula (IV) is produced by adding l-menthol to a 1,2-epoxy-3-halogenopropane represented by the general formula (I) (wherein X represents a halogen atom) in an organic solvent in the presence of a Lewis acid, thereby producing a 1-halogeno-3-l-menthoxypropan-2-ol represented by the general formula (II), allowing the first intermediate to react with an alkali metal salt of an aliphatic carboxylic acid having from 1 to 5 carbon atoms to produce a 1-acyloxy-2-substituted-3-l-menthoxypropane represented by the general formula (III) and then hydrolyzing the second intermediate.
一种安全高效地生产高纯度3-叶酚基丙烷-1,2-二醇及其中间体的方法,用于该方法。如下反应方程所示,通过将叶醇加入到一种1,2-环氧-3-卤代丙烷(通式(I)中X代表卤素原子)的有机溶剂中,在Lewis酸的存在下产生3-叶酚基丙烷-1,2-二醇(化学式(IV)),从而产生1-卤代-3-叶酚基丙烷-2-醇(通式(II)),让第一个中间体与具有1至5个碳原子的脂肪族羧酸的碱金属盐发生反应,产生1-酰氧基-2-取代-3-叶酚基丙烷(通式(III)),然后水解第二个中间体。