β-Phenylalanine Ester Synthesis from Stable β-Keto Ester Substrate Using Engineered ω-Transaminases
作者:Oliver Buß、Moritz Voss、André Delavault、Pascal Gorenflo、Christoph Syldatk、Uwe Bornscheuer、Jens Rudat
DOI:10.3390/molecules23051211
日期:——
new challenge, as they decompose easily in aqueous solution. To avoid this, transamination of the more stable β-keto esters would be an interesting alternative. For this reason, ω-transaminases were tested in this study, which enabled the transamination of the β-keto ester substrate ethyl benzoylacetate. Therefore, a ω-transaminase library was screened using a coloring o-xylylenediamine assay. The
在过去的二十年中,在许多情况下已经证明了使用ω-转氨酶成功地从酮中合成手性胺。相反,β-酮酸的胺化是一个特殊且相对较新的挑战,因为它们在水溶液中容易分解。为了避免这种情况,更稳定的β-酮酯的氨基转移将是一个有趣的选择。因此,在这项研究中测试了ω-转氨酶,使β-酮酸酯底物苯甲酰乙酸乙酯能够进行氨基转移。因此,使用着色邻二甲苯二胺测定法筛选了ω-转氨酶文库。ω-转氨酶突变体3FCR_4M和ATA117 11Rd在旨在合成手性(S)-和(R)-β-苯丙氨酸酯的进一步工程实验中显示出巨大潜力。这种替代方法导致(S)-和(R)-对映体的转化率分别为32%和13%。此外,通过进行半制备性合成来分离(S)-β-苯丙氨酸乙酯。