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).
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.
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
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