Catalytic and Atom-Economic Csp3
−Csp3
Bond Formation: Alkyl Tantalum Ureates for Hydroaminoalkylation
作者:Rebecca C. DiPucchio、Sorin-Claudiu Roşca、Laurel L. Schafer
DOI:10.1002/anie.201712668
日期:2018.3.19
achieved by rapid C−H alkylation of unprotected secondary arylamines with unactivated alkenes. The combination of Ta(CH2SiMe3)3Cl2, and a ureate N,O‐chelating‐ligand salt gives catalytic systems prepared in situ that can realize high yields of β‐alkylated aniline derivatives from either terminal or internal alkene substrates. These new catalyst systems realize C−H alkylation in as little as one hour
原子的经济和区域选择性ç -C键的形成已经由与未活化的烯烃未受保护的仲芳胺的快速C-H的烷基化来实现。Ta(CH 2 SiMe 3)3 Cl 2和尿酸盐N,O螯合配体盐的组合提供了就地制备的催化体系,该体系可以从末端或内部烯烃底物中实现高收率的β-烷基化苯胺衍生物。这些新的催化剂体系可在短短一个小时内实现CH烷基化,并且烯烃和胺底物的化学计量比为1:1,这是第一次通过简单的过滤和浓缩就可以高产率地合成分离的胺产物。