Stereoselective Synthesis of Enantiopure Oxetanes, a Carbohydrate Mimic, an ϵ-Lactone, and Cyclitols from Biocatalytically Derived β-Hydroxy Esters as Chiral Precursors
作者:Debabrata Das、Joydev Halder、Rajib Bhuniya、Samik Nanda
DOI:10.1002/ejoc.201402521
日期:2014.8
Biocatalytically derived enantiopure α-substituted β-hydroxy esters serve as excellent chirons for the synthesis of a diverse set of structures such as oxetanes, a carbohydrate mimic, an ϵ-lactone, and carbocyclic and aromatic cyclitols. The starting materials can be easily accessed in enantiopure form from α-substituted β-keto esters by biocatalytic reduction with Klebsiella pneumoniae (NBRC 3319)
生物催化衍生的对映体纯 α-取代 β-羟基酯是合成多种结构的极好基子,例如氧杂环丁烷、碳水化合物模拟物、ε-内酯以及碳环和芳香族环多醇。通过使用肺炎克雷伯菌 (NBRC 3319) 进行生物催化还原,可以很容易地从 α-取代的 β-酮酯以对映体纯形式获得起始材料。闭环复分解 (RCM) 是用于创建本文报道的碳环/杂环框架的关键转换之一。筛选合成的环醇对α-和β-葡萄糖苷酶的抑制作用。