申请人:——
公开号:US20040044229A1
公开(公告)日:2004-03-04
Disclosed is a process wherein a first olefin selected from certain &agr;,&bgr;-dihydroxyalkenes and 4-(alkenyl)ethylenecarbonates is reacted with a second olefin reactant to produce an olefin metathesis product. When the first olefin reactant is an optically enriched or enantiomerically pure &agr;,&bgr;-dihydroxyalkene, cross metathesis reactions produce products possessing the same optical purity. The &agr;,&bgr;-dihydroxyalkenes and the 4-(alkenyl)ethylene carbonates may be converted to hydrogenated products, and the 4-(alkenyl)ethylenecarbonates may be decarboxylated to provide the corresponding epoxides. The products of the disclosure may be used as monomers for the preparation of specialty polyesters and as intermediates in the manufacture pharmaceuticals and other chemicals.
本发明涉及一种工艺,其中从某些α,β-双羟基烯烃和4-(烯基)乙烯基碳酸酯中选择第一烯烃与第二烯烃反应,产生烯烃交换产物。当第一烯烃反应物是光学富集或对映纯的α,β-双羟基烯烃时,交叉烯烃反应产生具有相同光学纯度的产物。α,β-双羟基烯烃和4-(烯基)乙烯基碳酸酯可以转化为氢化产物,4-(烯基)乙烯基碳酸酯可以脱羧以提供相应的环氧化物。本发明的产物可用作特种聚酯的单体,以及制造药品和其他化学品的中间体。