Synthesis of prostaglandin A2 (PGA2) by means of a route involving enzymatic reactions is described. Enantioselective reduction and hydrolysis of trans-3, 4-bis(methoxycarbonyl)cyclopentanone (1) were examined using yeasts or enzymes, and it was found that (+)- and (-)-1 are easily obtained by an enzymatic procedure. Compound (+)-1 was converted to the Corey intermediate for PGA2 via the regioselective hydrolysis of the (+)-diacetate (8) with porcine pancreatic lipase. This synthesis based on the enzymatic approach was proved to be useful for the synthesis of both PGA and PGE from (-)-1.
本研究描述了通过酶促反应路线合成
前列腺素 A2 (
PGA2)的过程。使用酵母或酶对反式-3,4-双(甲氧羰基)
环戊酮(1)的对映选择性还原和
水解进行了研究,发现通过酶法过程很容易获得(+)-和(-)-1。化合物(+)-1通过猪胰
脂肪酶对(+)-二
乙酸酯(8)的区域选择性
水解,转化为
PGA2 的科里中间体。事实证明,这种基于酶法的合成方法可用于从 (-)-1 合成
PGA 和
PGE。