A Facile Chemoenzymatic Route to Optically Active 4,5-Disubstituted-2E-hexenoate Derivatives. I.
作者:Hiroyuki AKITA、Isao UMEZAWA、Michika TAKANO、Chiiko OHYAMA、Hiroko MATSUKURA、Takeshi OHISHI
DOI:10.1248/cpb.41.55
日期:——
The reaction of (±) methyl 4, 5-trans-epoxy-2E-hexenoate (2) with aromatic nucleophiles having an electrondonating group in the presence of BF3·Et2O gave the 4, 5-anti-5-hydroxy-4- or/and 2, 5-anti-5-hydroxy-2-substituted products. The 5-acetates of the 4, 5-anti-4-substitution products were subjected to enantioselective hydrolysis with lipase to provide the optically acitive 4, 5-disubstituted 2-hexenoate derivatives.
在BF3·Et2O存在下,(±)甲基4, 5-反式环氧-2E-己烯酸酯(2)与带有供电子基团芳香亲核试剂反应,生成4, 5-反式-5-羟基-4-或/和2, 5-反式-5-羟基-2-取代产物。4, 5-反式-4-取代产物的5-乙酸酯经脂肪酶手性水解,得到光学活性的4, 5-双取代2-己烯酸酯衍生物。