نتایج جستجو برای: aryl halides

تعداد نتایج: 17737  

2014
Laura K. G. Ackerman Lukiana L. Anka-Lufford Marina Naodovic Daniel J. Weix

The nickel-catalyzed cross-coupling of aryl halides with alkyl radicals derived from alkyl halides has recently been extended to couplings with carbon radicals generated by a co-catalyst. In this study, a new cocatalyst, cobalt phthalocyanine (Co(Pc)), is introduced and demonstrated to be effective for coupling substrates not prone to homolysis. This is because Co(Pc) reacts with electrophiles ...

2015
Eiji Yamamoto Satoshi Ukigai Hajime Ito

A transition-metal-free method has been developed for the boryl substitution of functionalized aryl-, heteroaryland alkenyl halides with a silylborane in the presence of an alkali-metal alkoxide. The basemediated boryl substitution of organohalides with a silylborane was recently reported to provide the corresponding borylated products in good to high yields, and exhibit good functional group c...

Journal: :Chemical science 2015
Eiji Yamamoto Satoshi Ukigai Hajime Ito

A transition-metal-free method has been developed for the boryl substitution of functionalized aryl-, heteroaryl- and alkenyl halides with a silylborane in the presence of an alkali-metal alkoxide. The base-mediated boryl substitution of organohalides with a silylborane was recently reported to provide the corresponding borylated products in good to high yields, and exhibit good functional grou...

Journal: :Molecules 2017
Dongjun Lv Mingjie Zhang

Two polymer catalysts (Pd-OCMCS and Ni-OCMCS) with good reusability were synthesized by coordinating Pd and Ni onto O-carboxymethyl chitosan (OCMCS). The chemical structure and thermal stability of prepared catalysts were determined by Fourier transform infrared (FT-IR) spectra, Energy Dispersive Spectrometer (EDS)analysis, X-ray diffraction (XRD), and thermogravimetric analyzer (TG-DTG), and t...

2014
Shaozhong Ge Wojciech Chaładaj John F. Hartwig

We report the Pd-catalyzed α-arylation of α,α-difluoroketones with aryl and heteroaryl bromides and chlorides catalyzed by an air- and moisture-stable palladacyclic complex containing P(t-Bu)Cy2 as ligand. The combination of this Pd-catalyzed arylation and base-induced cleavage of the acyl-aryl C-C bond within the α-aryl-α,α-difluoroketone constitutes a one-pot, two-step procedure to synthesize...

Journal: :New Journal of Chemistry 2021

Fe-MIL-101-isatin-Schiff-base-Co was synthesized and applied as a catalyst for Ullmann-type, Buchwald–Hartwig, Hirao, Hiyama Mizoroki–Heck cross-coupling reactions of aryl halides.

Journal: :Chemical communications 2014
Takeshi Takeda Ryosuke Obata Daisuke Muramatsu Yuichiro Takeda Akira Tsubouchi

Fluoride-free cross-coupling of aryl- and alkenyldimethylsilanes with organic halides proceeded in the presence of monocopper(I) alkoxide of ethylene glycol.

Journal: :Chemical communications 2009
Hanhui Xu Christian Wolf

A copper(I) catalyzed procedure for carbon-nitrogen bond formation utilizing aryl halides and either amines, including amino acids and diphenylamine, or aliphatic and aromatic amides is described.

Journal: :Chemical communications 2010
Linhai Jing Jiangtao Wei Li Zhou Zhiyong Huang Zhengkai Li Xiangge Zhou

Direct hydroxylation of a wide scope of aryl halides was catalyzed by a combination of CuI and lithium pipecolinate in water with yields up to 92%.

Journal: :ACS Catalysis 2021

The Suzuki–Miyaura cross-coupling between polyfluorinated arylboron nucleophiles and aryl halides enables the efficient construction of structural motifs frequently found in organic...

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