申请人:Kanegafuchi Chemical Industry Co., Ltd.
公开号:US05079382A1
公开(公告)日:1992-01-07
A 3,4-epoxybutyrate of the formula: ##STR1## wherein R.sup.1 is an alkyl or aralkyl group is efficiently prepared by a process comprising steps of: (a) reacting 3,4-dihydroxybutyronitrile of the formula: ##STR2## with a sulfonyl chloride of the formula: R.sup.2 --SO.sub.2 --Cl wherein R.sup.2 is an alkyl group or a phenyl group which may be substituted in the presence of a base to obtain a compound of the formula: ##STR3## (b) reacting the compound prepared in the step (a) with an alcohol of the formula: R.sup.1 --OH in the presence of an acid to obtain a compound of the formula: ##STR4## and (c) reacting the compound prepared in the step (b) with a base to obtain the 3,4-epoxybutyrate.
一种公式为##STR1##的3,4-环氧丁酸酯,其中R1是烷基或芳基烷基,可通过以下步骤高效制备:(a)在碱的存在下,将公式为##STR2##的3,4-二羟基丁腈与公式为R2-SO2-Cl的磺酰氯反应,其中R2是烷基或可能被取代的苯基,以获得公式为##STR3##的化合物;(b)在酸的存在下,将步骤(a)中制备的化合物与公式为R1-OH的醇反应,以获得公式为##STR4##的化合物;(c)将步骤(b)中制备的化合物与碱反应,以获得3,4-环氧丁酸酯。