申请人:Eastman Chemical Company
公开号:US06140516A1
公开(公告)日:2000-10-31
Disclosed is a process for preparing novel trans-3-alkyloxy-4-hydroxytetrahydrofurans including racemic and substantially enantiomerically pure (3S,4S)-trans-3-alk(en)yloxy-4-hydroxytetrahydrofurans and (3R,4R)-trans-3-alk(en)yloxy-4-acyloxytetrahydrofurans. The disclosed process comprises the steps of reacting 3,4-epoxytetrahydrofuran with an alcohol under Lewis acid catalysis to obtain a racemic trans-3-alk(en)yloxy-4-hydroxytetrahydrofuran; contacting the trans-3-alk(en)yloxy-4-hydroxytetrahydrofuran with an acyl donor in the presence of a hydrolase enzyme to produce a mixture of a substantially enantiomerically pure (3S,4S)-trans-3-alk(en)yloxy-4-hydroxytetrahydrofuran and a substantially enantiomerically pure (3R,4R)-trans-3-alk(en)yloxy-4-acyloxytetrahydrofuran; and separating the components of the mixture by partitioning between water and a solvent immiscible with water.
揭示了一种制备新型trans-3-烷氧基-4-羟基四氢呋喃的过程,包括消旋和基本对映纯度(3S,4S)-trans-3-烷(烯)氧基-4-羟基四氢呋喃和(3R,4R)-trans-3-烷(烯)氧基-4-酰氧基四氢呋喃。所述的过程包括以下步骤:在Lewis酸催化下,将3,4-环氧基四氢呋喃与醇反应,以获得消旋trans-3-烷(烯)氧基-4-羟基四氢呋喃;将trans-3-烷(烯)氧基-4-羟基四氢呋喃与酰基供体在水解酶酶的存在下接触,以产生基本对映纯度(3S,4S)-trans-3-烷(烯)氧基-4-羟基四氢呋喃和基本对映纯度(3R,4R)-trans-3-烷(烯)氧基-4-酰氧基四氢呋喃的混合物;通过在水和与水不相溶的溶剂之间分配来分离混合物的组分。