申请人:Stichting Dienst Landbouwkundig Onderzoek
公开号:US20140371472A1
公开(公告)日:2014-12-18
Disclosed is a process for the preparation of isoidide from isosorbide. An aqueous solution of isosorbide is subjected to epimerization in the presence of hydrogen under the influence of a catalyst comprising ruthenium on a support, preferably a carbon support. The process of the invention can be conducted using a relatively low hydrogen pressure, and leads to a desired distribution of epimers, favoring isoidide over isomannide and isosorbide.
本发明揭示了从异山梨醇制备异异二甲酯的过程。在催化剂的作用下,异山梨醇的水溶液在氢气存在下进行外消旋反应,所述催化剂包括负载有钌的载体,优选为碳载体。本发明的过程可以在相对较低的氢气压力下进行,且导致所需的外消旋异构体分布,有利于异异二甲酯优于异甘二醇和异山梨醇。