15517-45-0Relevant articles and documents
Novel and efficient bridged bis(N-heterocyclic carbene)palladium(II) catalysts for selective carbonylative Suzuki–Miyaura coupling reactions to biaryl ketones and biaryl diketones
El Ali, Bassam,Fettouhi, Mohammed,Mansour, Waseem
, (2020/03/23)
Bridged N,N′-substituted bisbenzimidazolium bromide salts (L1, L2, and L3) were synthesized and fully characterized. Reactions of palladium acetate with L1, L2, and L3 afforded corresponding new bridged bis(N-heterocyclic carbene)palladium(II) complexes (C1, C2, and C3) in high yields. The X-ray structure of complex C1 showed that the Pd(II) ion is bonded to the two carbon atoms of the bis(N-heterocyclic carbene) and two bromido ligands are in the cis position, resulting in a distorted square planar geometry. The three Pd(NHC)2Br2 complexes C1, C2, and C3 were evaluated in carbonylative Suzuki–Miyaura coupling reactions of aryl boronic acids with aryl halides and displayed high catalytic activity with low catalyst loading. The coupling reactions of aryl bromides were selective towards the carbonylation product at higher carbon monoxide pressure.
1,4-di(4-hydroxylbenzoyl)benzene monomer preparation method
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Paragraph 0017, (2017/10/10)
The invention relates to a high polymer material preparation method, in particular to a 1,4-di(4-hydroxylbenzoyl)benzene monomer preparation method. The method includes: selecting nitrobenzene as a solvent, aluminum trichloride as a catalyst and paraphtha
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%).