申请人:——
公开号:US20030181743A1
公开(公告)日:2003-09-25
A process for the preparation of alkylidene substituted succinates comprising a step (a) in which is carried out the reaction of a carbonilic compound, a succinic and a base in a reaction medium and a step (b) in which the alkylidene substituted product obtained in (a) is esterified, characterized in that the succinic ester is used in a molar amount substantially equal to, or lower than, the amount of compound carbonilic compound, (ii) the base is used in a molar amount substantially equal to the succinic ester and is selected from metal hydrides and metal and alkoxides, and (iii) the reaction medium comprises an aprotic liquid medium or a protic liquid medium having a Ka, measured in water, lower than that of iPrOH.
一种制备烷基亚烯替代琥珀酸盐的方法,包括步骤(a)中在反应介质中进行碳酰化合物、琥珀酸和碱的反应,以及步骤(b)中酯化得到的烷基亚烯替代产物,其特征在于琥珀酸酯的摩尔量基本等于或低于碳酰化合物的摩尔量,碱的摩尔量基本等于琥珀酸酯的摩尔量,并且选择自金属氢化物和金属、烷氧化物,反应介质包括无极性液体介质或具有在水中测得的Ka值低于iPrOH的极性液体介质。