Promoting the Hydrosilylation of Benzaldehyde by Using a Dicationic Antimony‐Based Lewis Acid: Evidence for the Double Electrophilic Activation of the Carbonyl Substrate
作者:Masato Hirai、Junsang Cho、François P. Gabbaï
DOI:10.1002/chem.201600971
日期:2016.5.4
The concomitant activation of carbonyl substrates by two Lewis acids has been investigated by using [1,2‐(Ph2MeSb)2C6H4]2+ ([1]2+), an antimony‐based bidentate Lewis acid obtained by methylation of the corresponding distibine. Unlike the simple stibonium cation [Ph3MeSb]+, dication [1]2+ efficiently catalyzes the hydrosilylation of benzaldehyde under mild conditions. The catalytic activity of this
通过使用[1,2-(Ph 2 MeSb)2 C 6 H 4 ] 2 +([ 1 ] 2 +)(一种通过锑获得的锑基双齿路易斯酸),研究了两种路易斯酸对羰基底物的伴随活化作用。相应的二甲双胍的甲基化。与简单的阳离子阳离子[Ph 3 MeSb] +不同,阳离子[ 1 ] 2+在温和的条件下有效催化苯甲醛的氢化硅烷化。该指示剂的催化活性与其双活化有机底物的羰基官能度的能力有关。[1 -μ 2 -DMF] [光学传递函数] 2,加合物,其中所述DMF氧原子桥接两个锑中心。