Chemo-Enzymatic Synthesis and Determination of the Absolute Configuration of Both Enantiomers of Methyl trans-5-Oxo-2-pentylpyrrolidine-3-carboxylate Precursors of the Aza Analogues of (+)- and (−)-Methylenolactocin
作者:Fulvia Felluga、Maurizio Fermeglia、Marco Ferrone、Giuliana Pitacco、Sabrina Pricl、Ennio Valentin
DOI:10.1002/1522-2675(200211)85:11<4046::aid-hlca4046>3.0.co;2-f
日期:2002.11
Enantiomerically pure methyl esters of (+)-(2R,3S)- and (−)-(2S,3R)-5-oxo-2-pentylpyrrolidine-3-carboxylic acid with 99% and 98% ee were obtained by enzymatic resolution of the corresponding racemic mixture using α-chymotrypsin and pig-liver acetone powder, respectively. Their absolute configurations were established by chemical methods, i.e., conversion of the trans-γ-lactam moiety to the corresponding
(+)-(2R,3S)- 和 (-)-(2S,3R)-5-oxo-2-pentylpyrrolidine-3-carboxy 酸的对映体纯甲酯通过酶拆分获得 99% 和 98% ee分别使用α-胰凝乳蛋白酶和猪肝丙酮粉制备相应的外消旋混合物。它们的绝对构型是通过化学方法确定的,即将反式-γ-内酰胺部分转化为相应的已知构型的γ-内酯。反式-γ-内酰胺和α-胰凝乳蛋白酶之间的有利相互作用通过分子力学计算得到合理化,这表明顺式-非对映异构体的情况有所不同。