Chemoenzymatic synthesis of optically active α-methylene-γ-carboxy-γ-lactams and γ-lactones
作者:Annalisa Bertoli、Lidia Fanfoni、Fulvia Felluga、Giuliana Pitacco、Ennio Valentin
DOI:10.1016/j.tetasy.2009.09.009
日期:2009.10
γ-lactones 14 and 15 were synthesised and resolved enzymatically by hydrolysis of their ester function, mediated by commercially available hydrolytic enzymes. In particular, the α-chymotrypsin proved to be active to all the substrates examined, displaying a different degree of activity and enantioselectivity, this latter increasing significantly towards the substrate with an aromatic substituent at the nitrogen
三个α亚甲基- γ甲酯基γ-butyrolactams(甲基α亚甲基- pyroglutamates)11,12和13,在该杂环中的氮置换不同,以及在结构上相关的γ内酯14和15被合成并通过可商购的水解酶介导的酯功能的水解而被酶解。特别地,事实证明,α-胰凝乳蛋白酶对所有受检底物均具有活性,表现出不同程度的活性和对映选择性,后者朝着在氮原子上带有芳族取代基的底物显着增加。