Enzymatic resolution of 4-N-phenylacetylamino-derivatives obtained from multicomponent reactions using PenG amidase and in silico studies
作者:Dirk Strübing、Helfried Neumann、Stefan Klaus、Axel Jacobi von Wangelin、Dirk Gördes、Matthias Beller、Paolo Braiuca、Cynthia Ebert、Lucia Gardossi、Udo Kragl
DOI:10.1016/j.tet.2003.11.065
日期:2004.1
The three component coupling reaction of aldehydes, phenylacetamide and dienophiles gave the corresponding N-phenylacetamidocyclohexene derivatives in good yields (55–70%) and high regioselectivity. For the first time, enzymatic kinetic resolution of this class of compounds has been achieved. The enantioselective hydrolysis of 4-N-phenylacetylamino-cis-3a,4,7,7a-hexahydroisoindole-1,3-dione derivatives
醛,苯乙酰胺和亲二烯体的三组分偶联反应以高收率(55-70%)和高区域选择性提供了相应的N-苯基乙酰胺基环己烯衍生物。首次实现了这类化合物的酶促动力学拆分。使用大肠杆菌中的青霉素G酰胺酶(PGA)对4- N-苯基乙酰氨基-顺式-3a,4,7,7a-六氢异吲哚-1,3-二酮衍生物进行对映选择性水解,得到剩余的对映体,ee值为30转换为50%时达到70%。根据分子模型预测,1- N合成了-苯基乙酰氨基-2-氰基-5-环己烯衍生物。动力学分辨率导致ee高达99%。观察到的选择性差异证实了基于酶-底物相互作用模拟的计算机模拟预测。