Enzyme-Mediated Preparation of Optically Active 1,2-Diols Bearing a Long Chain: Enantioselective Hydrolysis of Cyclic Carbonates
作者:Megumi Shimojo、Kazutsugu Matsumoto、Minoru Hatanaka
DOI:10.1016/s0040-4020(00)00904-2
日期:2000.11
A new entry for the efficient preparation of optically active 1,2-diols having a long aliphatic chain via an enzymatic reaction is disclosed. PPL catalyzes the hydrolysis of a racemic five-membered cyclic carbonate, 4-(7-benzyloxy)heptyl-1,3-dioxolan-2-one (2a), with high enantioselectivity to produce the optically active (R)-2a and (S)-9-benzyloxynonane-1,2-diol (3a) in excellent yields. The reaction
公开了通过酶促反应有效制备具有长脂族链的旋光性1,2-二醇的新条目。PPL催化外消旋五元环状碳酸酯4-(7-苄氧基)庚基-1,3-二氧戊环-2-酮(2a)的水解,具有高对映选择性,从而产生旋光性(R)-2a和(S)-9-苄氧基壬烷-1,2-二醇(3a),收率极高。该反应适用于具有较长链(10-苄氧基癸基(3b)和13-苄氧基十三烷基(3c))的底物。光学纯的(S)-(+)-8-羟基十六酸(1),具有手性长脂肪族部分的生物活性天然化合物,是从(R)-3-(7-苄氧基)庚基-2-环氧乙烷(9)开始有效合成的,后者是从3a的两种对映异构体转化而来的。