Various β-keto esters have been reduced by one of β-keto ester reductases isolated from bakers’ yeast. The corresponding β-hydroxy esters have been obtained in excellent enantiomeric and diastereomeric excesses, respectively. It has also been elucidated that the reductase recognizes the stereochemistry not only at the β-carbon but also at the α-carbon affording one of the four possible diastereoisomers
各种 β-
酮酯已被从面包酵母中分离出的一种 β-
酮酯还原酶还原。相应的β-羟基酯分别以极好的对映体和非对映体过量获得。还阐明了还原酶不仅识别 β-碳上的立体
化学,而且识别 α-碳上的立体
化学,主要提供 α-取代的 β-羟基酯的四种可能的非对映异构体之一。立体选择性非常好,
化学收率中等至良好。