71400-25-4Relevant articles and documents
A phosphane-free, atom-efficient cross-coupling reaction of triarylbismuths with acyl chlorides catalyzed by MCM-41-immobilized palladium complex
Zhao, Hong,Yin, Lin,Cai, Mingzhong
, p. 1337 - 1345 (2013)
The first phosphane-free, heterogeneous, atom-efficient cross-coupling reaction of triarylbismuths and acyl chlorides was achieved in N-methylpyrrolidone (NMP) with Bu3N as the base at 80 °C in the presence of 1.5 mol-% MCM-41-immobilized bidentate nitrogen palladium complex [MCM-41-2N-Pd(OAc)2, MCM = mobile crystalline material] to yield a variety of unsymmetrical biaryl ketones in good to excellent yields. This heterogeneous palladium catalyst exhibited a high activity, which was similar to that of Pd(PPh3)4. The catalyst can be recovered by a simple filtration of the reaction solution and recycled in at least 10 consecutive trials without any decrease in activity. Our system not only avoids the use of phosphane ligands, but also solves the basic problem of palladium catalyst recovery and reuse. The first phosphane-free, heterogeneous, atom-efficient cross-coupling reaction of triarylbismuth compounds and acyl chlorides was achieved in N-methylpyrrolidone with Bu3N as the base at 80 °C in the presence of 1.5 mol-% MCM-41-immobilized bidentate nitrogen palladium complex [MCM-41-2N-Pd(OAc)2] to yield a variety of unsymmetrical biaryl ketones in good to excellent yields. Copyright
Design and synthesis of novel chiral dihydroimidazolium cyclophanes as N-heterocyclic carbene precatalysts
Lu, Ting,Gu, Liuqun,Kang, Qiang,Zhang, Yugen
supporting information, p. 6602 - 6605,4 (2012/12/12)
A series of novel diphenyl ethylenediamine (DPEN) derived C2 symmetric dihydroimidazolium cyclophanes were designed and synthesized as organo NHC precatalysts. The resultant organo NHC-catalyzed reactions with superior enantioselectivity than t
Efficient catalyst-free bi- and triaroylation of aromatic rings in a single step
Lo Fiego, Marcos J.,Badajoz, Mercedes A.,Silbestri, Gustavo F.,Lockhart, Maria T.,Chopa, Alicia B.
supporting information; scheme or table, p. 9184 - 9187 (2009/04/11)
(Chemical Equation Presented) The exceptional leaving group ability of the trimethylstannyl group in electrophilic aromatic substitutions makes possible the synthesis, in a single step, of bi- and triaroylarenes through the catalyst-free, regioselective reaction of bi- and tristannylarenes with different aroyl halides in o-dichlorobenzene as solvent. Specific di- and triketones are obtained in good to excellent yields (45-83%).
