作者:Erwin R. van Rijssel、Pieter van Delft、Daan V. van Marle、Stefan M. Bijvoets、Gerrit Lodder、Herman S. Overkleeft、Gijsbert A. van der Marel、Dmitri V. Filippov、Jeroen D. C. Codée
DOI:10.1021/acs.joc.5b00419
日期:2015.5.1
lyxose-derived methyl and phenyl ketofuranoses with triethylsilane as nucleophile was found to proceed with good to excellent stereoselectivity to provide the 1,2-cis addition products. The methyl ketoses reacted in a more stereoselective manner than their phenyl counterparts. The stereochemical outcome of the reactions parallels the relative stability of the oxocarbenium ion conformers involved, as
发现路易斯酸介导的三乙基硅烷作为亲核试剂对核糖,阿拉伯糖,木糖和木糖衍生的甲基和苯基酮呋喃糖酶的还原反应具有良好或优异的立体选择性,从而提供了1,2-顺式加成产物。甲基酮糖的反应比其苯基对应物的立体选择性更高。反应的立体化学结果与所涉及的氧碳鎓离子构象异构体的相对稳定性平行,这是通过计算其完整构象空间的自由能表面图来评估的。路易斯酸介导的还原允许具有可预测的立体化学的C-糖苷的直接合成。