화학공학소재연구정보센터
Journal of the American Chemical Society, Vol.140, No.29, 9255-9260, 2018
Highly Ambiphilic Room Temperature Stable Six-Membered Cyclic (Alkyl)(amino)carbenes
Cyclic (alkyl)(amino)carbenes with a six-membered backbone were prepared. Compared to their five-membered analogues, they feature increased %V-bur and enhanced donor and acceptor properties, as evidenced by the observed n -> pi* transition trailing into the visible region. The high ambiphilic character even allows for the intramolecular insertion of the carbene into an unactivated C(sp(3))-H bond. When used as ligands, they outcompete the five-membered analogues in the palladium-mediated alpha-arylation of ketones with aryl chlorides.