Friedel-Crafts-Type Intermolecular C−H Silylation of Electron-Rich Arenes Initiated by Base-Metal Salts
作者:Qin Yin、Hendrik F. T. Klare、Martin Oestreich
DOI:10.1002/anie.201510469
日期:2016.2.24
An electrophilic aromatic substitution (SEAr) with a catalytically generated silicon electrophile is reported. Essentially any commercially available base‐metal salt acts as an initiator/catalyst when activated with NaBArF4 . The thus‐generated Lewis acid then promotes the SEAr of electron‐rich arenes with hydrosilanes but not halosilanes. This new C−H silylation was optimized for FeCl2 /NaBArF4 ,
亲电芳族取代(S Ë报道AR)与催化产生的硅电试剂。当用NaBAr F 4活化时,基本上任何市售的贱金属盐都可作为引发剂/催化剂 。然后,由此产生的路易斯酸会与氢硅烷(而不是卤代硅烷)一起促进富电子芳烃的S E Ar。针对FeCl 2 / NaBAr F 4对这种新的CHH甲硅烷基化进行了优化, 在低至0.5 mol%的催化剂负载下提供了良好的收率。该过程非常简单,与典型的Friedel-Crafts方法非常接近,在该方法中不需要添加碱来吸收释放的质子。
Preparation Of Aromatic-Substituted Silylamines By The Dehydrogenative Coupling Of Aromatic-Substituted Amine N-H And Si-H Bonds
申请人:California Institute Of Technology
公开号:US20190218232A1
公开(公告)日:2019-07-18
The present disclosure is directed at methods of forming an N—Si silyl bond, the method comprising contacting an organic substrate comprising an aromatic amine having at least one N—H bond with a mixture comprising of (a) at least one hydrosilane or hydrosiloxane and (b) at least one hydroxide or alkoxide, under conditions sufficient to form the N—Si bond. The disclosure is further directed to the compositions involved in these methods and the products that result therefrom.