Methods for the enantioselective conversion of d-xylose into differentially protected myo-inositol and l-chiro-inositol have been developed. The key transformation is a highly diastereoselective intramolecular SmI2-promoted pinacol coupling. The stereoselectivity was extremely dependent on the conditions, suggesting a change in mechanism. Preliminary mechanistic experiments and possible explanations for this behavior are discussed.
                                    已开发出将d-
木糖选择性转化为不同保护形式的肌醇和l-奇霉醇的方法。关键转化是高度的非对映选择性内分子
SmI2促成的皮那克尔耦合。立体选择性极度依赖于反应条件,提示机制可能发生变化。讨论了初步的机制实验及对此行为的可能解释。