Novel enzymatic reduction of α-amido- and α-cyanoalkyl-β-keto esters catalyzed by ketoreductases
作者:Vasileios Giannopoulos、Theodore Tyrikos-Ergas、Kamela Myrtollari、Ioulia Smonou
DOI:10.1016/j.mcat.2020.110952
日期:2020.7
anoate, a valuable chiral intermediate for the synthesis of lactacystin, was obtained in high yield and excellent anti-diastereoselectivity. The ketoreductase catalyzed reduction of α-cyanomethyl- and α-cyanoethyl-β-keto esters to form the corresponding optically pure β-hydroxy esters, which are chiral intermediates for the synthesis of optically pure α-substituted γ-butyro and δ-valerolactams, was
已经开发出用于不对称还原α-酰胺基和α-氰基烷基-β-酮酯的酶促方法。我们已经表明,NADPH依赖性酮还原酶可以以优异的活性和高的立体选择性催化这些转化,从而产生光学纯的β-羟基-α-酰胺基酯以及光学纯的β-羟基-α-氰基烷基酯。用这种方法,以高收率和优异的抗微生物性获得了2-乙酰氨基-3-羟基-4-甲基戊酸叔丁酯,它是合成乳酸的有价值的手性中间体。-非对映选择性。酮还原酶催化α-氰基甲基-和α-氰基乙基-β-酮基酯的还原反应,形成相应的旋光纯β-羟基酯,它们是合成旋光纯α-取代的γ-丁丁和δ-戊内酰胺的手性中间体,该化合物以高收率和高立体选择性完成,导致四分之一的立体异构体(> 99%de,> 99%ee,> 99%转化率)。