Substrate screening of amino transaminase for the synthesis of a sitagliptin intermediate
作者:Anwei Hou、Zixin Deng、Hongmin Ma、Tiangang Liu
DOI:10.1016/j.tet.2016.06.039
日期:2016.8
We reported herein a new enzymatic route to synthesize a sitagliptin intermediate using an aminotransferase. Substrate profile indicated that hydroxyethyl-3-oxo-4-(2,4,5-trifluorophenyl)butanoate, among 11 analogs, showed the best biocatalytic performance, partially due to its best solubility in the enzymatic system. The corresponding amino esters showing strong product inhibition on the reaction,
我们在本文中报道了使用氨基转移酶合成西他列汀中间体的新的酶促途径。底物特征表明,在11种类似物中,羟乙基-3-氧代-4-(2,4,5-三氟苯基)丁酸酯显示出最佳的生物催化性能,部分是由于其在酶体系中的最佳溶解性。在反应中显示出强烈的产物抑制作用的相应氨基酯倾向于自水解,从而推动了反应的进行,这表明羟乙基酯的快速水解对生物催化性能的贡献。反应在24小时内以100 mM进行,转化率为82%。将该氨基酯产物进一步转化为西他列汀的关键中间体Boc-(R)-3-氨基-4-(2,4,5-三氟苯基)丁酸。