Lipase-Involved Strategy to the Enantiomers of 4-Benzyl-β-Lactam as a Key Intermediate in the Preparation of β-Phenylalanine Derivatives
作者:Xiang-Guo Li、Liisa T. Kanerva
DOI:10.1002/adsc.200505253
日期:2006.1
A simple chemoenzymatic method for the preparation of the enantiomers of 4-benzyl-β-lactam (4-benzylazetidin-2-one) from allylbenzene has been described. The enantiomers of this key intermediate have been used to produce the corresponding enantiomers of β-phenylalanine and N-Boc-protected β-phenylalanine amide through the simple cleavage of the lactam ring by acid-catalyzed hydrolysis and by ammonolysis
已经描述了一种从烯丙基苯制备4-苄基-β-内酰胺(4-苄基氮杂环丁烷-2-酮)对映异构体的简单化学酶促方法。该关键中间体的对映异构体已通过分别通过酸催化水解和通过氨解简单地裂解内酰胺环而用于生产相应的β-苯丙氨酸和N -Boc保护的β-苯丙氨酸酰胺的对映异构体。Burkholderia cepacia脂肪酶催化的动力学双分辨技术负责实现产品中的对映体纯度。这是通过酰化进行Ñ -hydroxymethylatedβ内酰胺,随后所得到的(的butanolysis小号)-酯。还研究了直接脂肪酶催化的β-内酰胺环的裂解。