作者:Manuel Mahlau、Pilar García-García、Benjamin List
DOI:10.1002/chem.201203623
日期:2012.12.14
Lewis acid catalyzed Hosomi–Sakurai reaction of (hetero)aromatic aldehydes and allylsilanes using an easily handled disulfonimide precatalyst (see scheme). The key to the success of this system is to turn the usually undesired silylium ion catalysis into the desired catalytic regime and pair the cation with an enantiopure disulfonimide anion, thereby applying the concept of asymmetric counteranion‐directed
抗衡阴离子的控制可使用易于处理的二磺酰亚胺预催化剂使对映体选择性有机路易斯酸催化(杂)芳族醛和烯丙基硅烷的Hosomi-Sakurai反应(参见方案)。该系统成功的关键在于将通常不希望的甲硅烷基离子催化转化为所需的催化方案,并将阳离子与对映体纯的二磺酰亚胺阴离子配对,从而应用了不对称抗衡阴离子导向催化的概念。