7600-46-6Relevant academic research and scientific papers
Pd-Catalyzed Site-Selective p-Hydroxyphenyloxylation of Benzylic α-C(sp3)-H Bonds with 1,4-Benzoquinone
Song, Guangjun,Zheng, Ziwei,Wang, Yanhui,Yu, Xinhong
supporting information, p. 6002 - 6005 (2016/12/09)
A Pd-catalyzed, site-selective p-hydroxyphenyloxylation of benzylic α-C(sp3)-H bonds with 1,4-benzoquinone using thioamide as a directing group is reported. 1,4-Benzoquinone is employed as the p-hydroxyphenyloxy source without extra oxidants. T
Catalytic Enantioselective α-Fluorination of 2-Acyl Imidazoles via Iridium Complexes
Xu, Guo-Qiang,Liang, Hui,Fang, Jie,Jia, Zhi-Long,Chen, Jian-Qiang,Xu, Peng-Fei
supporting information, p. 3355 - 3358 (2016/12/09)
The first highly enantioselective α-fluorination of 2-acyl imidazoles utilizing iridium catalysis has been accomplished. This transformation features mild conditions and a remarkably broad substrate scope, providing an efficient and highly enantioselective approach to obtain a wide range of fluorine-containing 2-acyl imidazoles which are found in a variety of bioactive compounds and prodrugs. A large scale synthesis has also been tested to demonstrate the potential utility of this fluorination method.
Insights into directing group ability in palladium-catalyzed C-H bond functionalization
Desai, Lopa V.,Stowers, Kara J.,Sanford, Melanie S.
supporting information; experimental part, p. 13285 - 13293 (2009/02/06)
This paper describes a detailed investigation of factors controlling the dominance of a directing group in Pd-catalyzed ligand-directed arene acetoxylation. Mechanistic studies, involving reaction kinetics, Hammett analysis, kinetic isotope effect experiments, and the kinetic order in oxidant, have been conducted for a series of different substrates. Initial rates studies of substrates bearing different directing groups showed that these transformations are accelerated by the use of electron-withdrawing directing groups. However, in contrast, under conditions where two directing groups are in competition with one another in the same reaction flask, substrates with electron-donating directing groups react preferentially. These results are discussed in the context of the proposed mechanism for Pd-catalyzed arene acetoxylation.
Palladium-catalyzed cross-coupling reaction of aryldioxaborolane with 2-bromo-N,N-dimethylacetamide
Lu, Ting-Yi,Xue, Cuihua,Luo, Fen-Tair
, p. 1587 - 1590 (2007/10/03)
A Suzuki-type cross-coupling of aryldioxaborolane with 2-bromo-N,N-dimethylacetamide in the presence of a catalytic amount of tricyclohexylphosphine as the ligand and hydroquinone as the free-radical scavenger has been demonstrated as a convenient and simple way for the synthesis of α-arylacetamide.
