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.
A new method of ortho-fluorination where an aryl C—H bond is directly replaced by an aryl C-F bond in a palladium-catalyzed reaction is provided. The method includes the ortho-fluorination of a triflamide protected benzylamine, a palladium catalyst, such as Pd(OTf)
2
, a fluorinating reagent such as N-fluoro-2,4,6-trimethylpyridinium triflate, and a ligand to promote the reaction such as N-methylpyrrolidinone (NMP).
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.
Direct acylation of N-benzyltriflamides from the alcohol oxidation level via palladium-catalyzed C–H bond activation
作者:Jihye Park、Aejin Kim、Satyasheel Sharma、Minyoung Kim、Eonjeong Park、Yukyoung Jeon、Youngil Lee、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1039/c3ob40140e
日期:——
A palladium-catalyzed ortho-acylation of N-benzyltriflamides from the alcohol oxidation level via C–H bondactivation is described. These transformations have been applied to a wide range of substrates, and typically proceed with excellent levels of chemoselectivity and with high functional group tolerance.