Diastereoselective Synthesis of All Eight <scp>l</scp>-Hexoses from <scp>l</scp>-Ascorbic Acid
作者:Ludmila Ermolenko、N. André Sasaki
DOI:10.1021/jo0521192
日期:2006.1.1
A novel versatile method for the synthesis of all eight diastereomerically pure l-hexoses was developed. l-Ascorbic acid was converted to two diastereomers A. These α-hydroxy esters were transformed into four γ-alkoxy-α,β-unsaturated esters C via the intermediates B and subsequent Wittig olefination reactions. Each one of compounds C was subjected to dihydroxylation to provide a set of two diols D
开发了一种新颖的通用方法,用于合成所有八种非对映体纯的1-己糖。升抗坏血酸转化为两种非对映甲。这些α-羟基酯经中间体B和随后的Wittig烯化反应转化为四种γ-烷氧基-α,β-不饱和酯C。化合物中的每一个Ç进行二羟基化,以提供一组两个二醇d。通过使用(DHQD)2 PHAL和(DHQ)2 PHAL作为手性配体来操纵二醇形成中的抗/同分化。进一步的两步反应序列可提供全部八个非对映异构体l-己糖