Chemoenzymatic synthesis of diastereomeric ethyl γ-benzyl paraconates and determination of the absolute configurations of their acids
作者:Federico Berti、Fulvia Felluga、Cristina Forzato、Giada Furlan、Patrizia Nitti、Giuliana Pitacco、Ennio Valentin
DOI:10.1016/j.tetasy.2006.08.013
日期:2006.9
resolution of the corresponding lactonic esters with α-chymotrypsin (α-CT) with acetone added as a cosolvent. Their absolute configurations were determined by 1H NMR analysis of their 1-(9-anthryl)-2,2,2-trifluoroethyl esters.
对映体纯(99%ee)的顺式和反式-γ-苄基对圆锥体酸及其乙酯是通过以下方法合成的:将相应的内酯与α-胰凝乳蛋白酶(α-CT)进行动力学酶解,并加入丙酮作为助溶剂。通过其1-(9-蒽基)-2,2,2-三氟乙基酯的1 H NMR分析确定其绝对构型。