Chelation-controlled regioselectivity in the lanthanum-promoted monobenzoylation of monosaccharides in water
作者:Ian James Gray、Ronald Kluger
DOI:10.1016/j.carres.2007.05.024
日期:2007.10
formation of the ester, which competes with hydrolysis of BzMP, to give an estimate of the efficiency of the conversion of the sugar. Higher conversions can be achieved using excess reagent. Regioselectivity is influenced by the structure of the glycoside. For example, the reaction leads to different product distributions from alpha- and beta-anomers of the glycosides. The reaction combination provides a
在水中与苯甲酰基甲基磷酸酯(BzMP)和镧盐进行碱催化的反应中,单糖选择性地转化为单苯甲酸酯。以形成酯的方式报道了产率,该酯与BzMP的水解竞争,从而给出了糖转化效率的估计。使用过量的试剂可以实现更高的转化率。区域选择性受糖苷结构的影响。例如,该反应导致与糖苷的α-和β-异头物不同的产物分布。该反应组合为在特定几何条件下有效形成酯提供了基础,提供了识别和修饰的手段。