作者:Bifu Liu、Wensen Ouyang、Jianhong Nie、Yang Gao、Kejun Feng、Yanping Huo、Qian Chen、Xianwei Li
DOI:10.1039/d0cc04739b
日期:——
coordinated amine derivative enabled regioselective C–H functionalization remains challenging due to the elusive achievement of reactivity and selectivity simultaneously. Herein, regioselective C–Halkynylation of various readily transformable nitrogen functionalities was developed with great efficiency, with the assistance of the mono-N-protected amino acid (MPAA) ligand via Pd(II) catalysis proceeding via
An efficient protocol for a one-pot synthesis of mono-sulfonamides has been developed. It features utilization of excess of sulfonylating agent followed by base mediated recovery of the primary sulfonamide.
Palladium-Catalyzed Oxidative Acylation of<i>N</i>-Benzyltriflamides with Aldehydes<i>via</i>CH Bond Activation
作者:Satyasheel Sharma、Jihye Park、Eonjeong Park、Aejin Kim、Minyoung Kim、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1002/adsc.201200889
日期:2013.1.29
A palladium-catalyzed ortho-acylation of N-benzyltriflamides with aldehydes via direct sp2 CH bondactivation is described. Benzylamines with a triflamide directing group in the presence of palladium acetate, acetic acid, and tert-butyl hydroperoxide as an oxidant can be effectively coupled with aryl and alkyl aldehydes to provide ortho-acyl-N-benzyltriflamides with a high regioselectivity.
cyclization via C(sp2)–H activation with a cooperative catalytic system consisting of a Cp*Rh(III) complex and a chiral Lewis base is described. An α,β-unsaturated acyl ammonium intermediate is generated from a chiral isochalcogenurea catalyst and an acyl fluoride reacts with a metallacycle generated from the Cp*Rh catalyst and a benzylamine derivative. This cooperative catalytic system gives a variety