Highly stereoselective and stereospecific syntheses of a variety of quercitols from d-(−)-quinic acid
作者:Tzenge-Lien Shih、Ya-Ling Lin、Wei-Shen Kuo
DOI:10.1016/j.tet.2004.11.084
日期:2005.2
The highly stereoselective synthesis of (−)-epi-, (−)-allo- and neo-quercitols as well as stereospecific synthesis of (−)-talo- and (+)-gala-quercitols have been achieved. The general strategy is employing dihydroxylation of the isolated double bond of various kinds of protected chiral (1,4,5)-cyclohex-2-ene-triols, which are derived from d-(−)-quinic acid. The choosing of protecting groups from either
( - ) -的高度立体选择性合成外延- , - ( - ) -异基因-和新-quercitols以及的立体定向合成( - ) -距骨-和(+) -节日-quercitols已经实现。通用策略是对衍生自d-(-)-奎尼酸的各种受保护的手性(1,4,5)-环己-2-烯-三醇的分离的双键进行二羟基化。从BBA(2,3-丁烷丁二醛)或乙酰基中选择保护基将导致二羟基化的立体选择性的不同程度。另一方面,亚环己基缩醛部分归因于二羟基化过程中的立体特异性,以提供所需的分子。