Studies on the chemoselectivity and diastereoselectivity of samarium(II) iodide mediated transformations of carbohydrate derived ω-halo-α,β-unsaturated esters
作者:Sharon M. Bennett、Raphinos Kouya Biboutou、Zhihong Zhou、Robert Pion
DOI:10.1016/s0040-4020(98)00191-4
日期:1998.5
Some carbohydrate derived ω-bromo- and ω-iodo- α,β- unsaturated esters were reduced with SmI2 under a variety of conditions. The chemoselectivity varies dramatically with the choice of solvent system, the identity of halogen atom, the type of ester used, the geometry of the double bond, and the oxygenation pattern of the substrate. The stereoselectivity of the SmI2 mediated reactions is also influenced
在各种条件下,SmI 2还原了一些碳水化合物衍生的ω-溴-和ω-碘-α,β-不饱和酯。化学选择性随溶剂系统的选择,卤素原子的身份,所用酯的类型,双键的几何形状以及底物的氧化方式而有很大不同。SmI 2介导的反应的立体选择性也受反应参数的影响。