Oxygen-atom insertion of NHC–copper complex: The source of oxygen from N,N-dimethylformamide
摘要:
An unprecedented protocol for oxygen-atom insertion reaction of NHC-copper complexes has been developed by employing N,N-dimethylformamide as the oxygen source, which allows the preparation of imidazolinones from carbene complexes and decodes one of the mysterious transformations of NHC-metal complexes as well. (C) 2013 Elsevier B.V. All rights reserved.
Oxygen-atom insertion of NHC–copper complex: The source of oxygen from N,N-dimethylformamide
摘要:
An unprecedented protocol for oxygen-atom insertion reaction of NHC-copper complexes has been developed by employing N,N-dimethylformamide as the oxygen source, which allows the preparation of imidazolinones from carbene complexes and decodes one of the mysterious transformations of NHC-metal complexes as well. (C) 2013 Elsevier B.V. All rights reserved.
申请人:Commissariat a L'Energie Atomique et aux Energies Alternatives
公开号:US20170240485A1
公开(公告)日:2017-08-24
The invention relates to a method for (I) producing a carboxylic ester of formula (I). Said method comprises the steps of: a) bringing an organosilane/borane of formula Si or B into contact with CO
2
, in the presence of a catalyst and an electrophilic compound of formula (III), the groups R
1
, R
2
, R
3
, R
4
, R
5
, Y, and M′ being as defined in claim 1; and optionally b) recovering the compound of formula (I) produced.
Herein, a copper‐catalyzed C−F bond defluorosilylation reaction of tetrafluoroethylene and other polyfluoroalkenes is described. Mechanistic studies, based on a series of stoichiometric reactions with copper complexes, revealed that the key steps of this defluorosilylation reaction are 1) the 1,2‐addition of a silylcopper intermediate to the polyfluoroalkene and 2) a subsequent selective β‐fluorine
Synthesis and Reactivity of Functionalized Arylcopper Compounds by Transmetalation of Organosilanes
作者:Jessica R. Herron、Zachary T. Ball
DOI:10.1021/ja8070804
日期:2008.12.10
and parcel of synthetic chemistry. Organosilanes potentially represent a cheap, robust, and environmentally benign precursor to reactive organometallics, but the nature of the very stable C−Si bond has generally prevented their use as precursors to more reactive organometallics. We present investigations into a copper fluoride complex which activates organosilanes in anhydrous media under mild conditions
NHC–copper hydrides as chemoselective reducing agents: catalytic reduction of alkynes, alkyl triflates, and alkyl halides
作者:Nick Cox、Hester Dang、Aaron M. Whittaker、Gojko Lalic
DOI:10.1016/j.tet.2014.04.004
日期:2014.7
as well as the NHC–copper-catalyzed reduction of primary alkyl triflates and primary and secondary alkyl iodides and bromides are described. The high chemoselectivity demonstrated in these examples illustrates the mild nature of copper hydride complexes as reducing agents, which have applications in synthetic chemistry beyond their traditional role in the reduction of activated alkenes and carbonyl compounds
Synthesis, structure, and reactions of a copper–sulfido cluster comprised of the parent Cu<sub>2</sub>S unit: {(NHC)Cu}<sub>2</sub>(μ-S)
作者:Junjie Zhai、Alexander S. Filatov、Gregory L. Hillhouse、Michael D. Hopkins
DOI:10.1039/c5sc03258j
日期:——
The first CuI2(μ-S) complex, (IPr*)Cu}2(μ-S) (IPr* = 1,3-bis(2,6-(diphenylmethyl)-4-methylphenyl)imidazol-2-ylidene), has been synthesized, and its structure has been characterized crystallographically.