Advances in the Synthesis of Homochiral (−)-1-Azafagomine and (+)-5-<i>epi</i>-1-Azafagomine. 1-<i>N</i>-Phenyl Carboxamide Derivatives of both Enantiomers of 1-Azafagomine: Leads for the Synthesis of Active α-Glycosidase Inhibitors.
作者:M. José Alves、Flora T. Costa、Vera C. M. Duarte、Antonio Gil Fortes、José A. Martins、Nuno M. Micaelo
DOI:10.1021/jo201486q
日期:2011.12.2
for functionalizing alkenes into molecules bearing a glucosyl framework. Homochiral (+)-5-epi-1-azafagomine was synthetized for the first time. Partial reductive cleavage of the phenyltriazolidinone moiety afforded new homochiral 1-N-phenyl carboxamide derivatives of 1-azafagomine. Both enantiomers of these derivatives were synthetized and tested, displaying a very good enzymatic inhibition toward baker's
已经设计了一种新的快速制备手性同位(-)-1-氮杂胺和(+)-5-表位-1-氮杂胺的方法。Stoodley将带有2,3,4,6-四乙酰基葡萄糖基手性助剂的二烯的非对映选择性环加成到4-苯基-1,2,4-三唑-3,5-二酮与Bols协议合并,将烯烃官能化为带有葡萄糖基的分子框架。首次合成了手性(+)-5-表位-1-氮杂胺。苯基三唑烷酮部分的部分还原性裂解得到1-氮杂花果胺的新的同手性1- N-苯基羧酰胺衍生物。合成并测试了这些衍生物的两种对映异构体,显示出对面包酵母酵母α-葡萄糖苷酶的很好的酶抑制作用。1-的分子识别机理通过分子模拟研究了来自面包酵母的1-氮杂谷氨酰胺的N-苯基羧酰胺衍生物。将1- N-苯基羧酰胺基团的芳香环有效填充到酶活性位点的疏水亚位点(口袋)中,似乎是导致与未衍生化的(-)-1-azafagomine和( +)-1-氮杂胺。