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.
Direct access to isoindolines through tandem Rh(<scp>iii</scp>)-catalyzed alkenylation and cyclization of N-benzyltriflamides
作者:Neeraj Kumar Mishra、Jihye Park、Satyasheel Sharma、Sangil Han、Mirim Kim、Youngmi Shin、Jinbong Jang、Jong Hwan Kwak、Young Hoon Jung、In Su Kim
DOI:10.1039/c3cc49486a
日期:——
The rhodium-catalyzed oxidative alkenylation of N-benzyltriflamides with olefins followed by an intramolecular cyclization via C–H bond activation is described.
A Radical Approach for Asymmetric α-C–H Addition of <i>N</i>-Sulfonyl Benzylamines to Aldehydes
作者:Hui Hu、Zhaoxin Shi、Xiaochong Guo、Feng-Hua Zhang、Zhaobin Wang
DOI:10.1021/jacs.3c12043
日期:2024.2.28
Efficient synthesis of enantioenriched amines is of great importance due to their significant synthetic and biological applications. Photoredox-mediated asymmetric α-amino C(sp3)–H functionalization offers an atom-economical and sustainable approach to access chiral amines. However, the development of analogous reactions is in its early stages, generally affording chiral amines with a single stereocenter