Activation of the Si−B Linkage: Copper-Catalyzed Addition of Nucleophilic Silicon to Imines
作者:Devendra J. Vyas、Roland Fröhlich、Martin Oestreich
DOI:10.1021/ol200509c
日期:2011.4.15
quickly developed into a practical method to generate Cu−Si reagents. These silicon nucleophiles cleanly add to aldehyde-derived imine electrophiles to form α-silylated amines in protic media, and no carbon-to-nitrogen Brook-type rearrangement of the intermediate anion is observed. Aside from electron-withdrawing groups at the imine nitrogen atom, for example, SO2Tol and P(O)Ph2, previously delicate nitrogen
通过铜催化的过渡金属化对Si-B键的激活迅速发展为一种生成Cu-Si试剂的实用方法。这些硅亲核试剂干净地添加到醛衍生的亚胺亲电试剂中,从而在质子介质中形成α-甲硅烷基化胺,并且未观察到中间阴离子的碳-氮布鲁克型重排。除了亚胺氮原子上的吸电子基团(例如SO 2 Tol和P(O)Ph 2)外,还可以耐受先前精密的氮取代基,例如苯基或二苯甲基。相同的协议还允许史无前例地添加代表酮的亚胺。