An Efficient Method for the Refinement of 1,3-Methyleneglycerol via Bridged Acetal Exchange and the Synthesis of a Symmetrically Branched Glycerol Trimer
作者:Hisao Nemoto、Hatsuhiko Hattori、Tsuyoshi Matsushita、Kohsuke Yoshitomi、Ayato Katagiri
DOI:10.1055/s-0031-1289809
日期:2012.8
bridged acetal exchange. The minor 1,2-isomer is removed via sequential pivaloylation and tritylation to afford the desired 1,3-isomer in >99.5% purity. A symmetrically branched triglycerol is efficiently synthesized starting from the purified 1,3-isomer. Acid-catalyzed equilibrium of a mixture of 1,2- and 1,3-methyleneglycerol in 1,4-dioxane affords predominantly the 1,3-isomer via bridged acetal exchange
摘要 1,2-和1,3-亚甲基甘油在1,4-二恶烷中的混合物的酸催化平衡主要通过桥缩醛交换得到1,3-异构体。经由顺序的聚乙烯醇化和三苯甲基化除去次要的1,2-异构体,以提供纯度> 99.5%的所需1,3-异构体。从纯化的1,3-异构体开始有效地合成对称分支的甘油三酸酯。 1,2-和1,3-亚甲基甘油在1,4-二恶烷中的混合物的酸催化平衡主要通过桥缩醛交换得到1,3-异构体。经由顺序的聚乙烯醇化和三苯甲基化除去次要的1,2-异构体,以提供纯度> 99.5%的所需1,3-异构体。从纯化的1,3-异构体开始有效地合成对称分支的甘油三酸酯。