New Efficient Route to the Synthesis of Enantiopure (+) and (−) Bicyclo[2.2.1]heptan‐<i>syn</i>‐2,7‐diol using Lipase‐Catalyzed Transesterifications
作者:José E. D. Martins、Luciane F. de Oliveira、Valentim E. U. Costa
DOI:10.1080/00397910600941489
日期:2006.11.1
[2.2.1]hept‐5‐en‐2‐endo‐ol (±)‐7, using lipase‐catalyzed transesterification and a series of standard procedures, we prepared the enantiomers (+)‐(2R, 7S) and (−)‐(2S, 7R) bicyclo[2.2.1] heptan‐2,7‐syn‐diol 3 through a new alternative route with excellent yields and enantiomeric excess (up to 99%). These chiral bidentate compounds possess very rigid molecular structures and a favorable stereochemistry
摘要 从外消旋的 7,7-二甲氧基-1,4,5,6-四氯双环[2.2.1]hept-5-en-2-endo-ol (±)-7 开始,使用脂肪酶催化的酯交换和一系列按照标准程序,我们通过新的替代路线制备了对映异构体 (+)-(2R, 7S) 和 (-)-(2S, 7R) bicyclo[2.2.1] heptan-2,7-syn-diol 3和对映体过量(高达 99%)。这些手性双齿化合物具有非常刚性的分子结构和有利的金属配位立体化学,因此成为不对称合成的有前途的手性配体。