Highly Active and Selective Catalysts for the Formation of α-Aryl Ketones
作者:Joseph M. Fox、Xiaohua Huang、André Chieffi、Stephen L. Buchwald
DOI:10.1021/ja993912d
日期:2000.2.1
biphenyl backbone, when combined with Pd(OAc)2, give highly active catalysts for the α-arylation of ketones. The ligand 2-methyl-2‘-dicyclohexylphosphinobiphenyl is particularly effective, and with 0.1−1.0 mol % Pd, a large variety of aryl halides and ketones react efficiently and with high selectivity. For two types of substrates, the ligands BINAP and Xantphos are more effective than the biphenyl-based
Versatile O- and S-functionalized 1,2,3-triazoliums: ionic liquids for the Baylis–Hillman reaction and ligand precursors for stable MIC-transition metal complexes
作者:Daniel Mendoza-Espinosa、Rodrigo González-Olvera、Cecilia Osornio、Guillermo E. Negrón-Silva、Rosa Santillan
DOI:10.1039/c4nj02076f
日期:——
A series of O- and S-functionalized triazolium salts display high performance in the Baylis–Hillman addition and allow the one-pot formation of MIC-transition metal complexes.
Fe(<scp>iii</scp>)-mediated isomerization of α,α-diarylallylic alcohols to ketones via radical 1,2-aryl migration
作者:Ziyang Deng、Changwei Chen、Sunliang Cui
DOI:10.1039/c6ra20007a
日期:——
An Fe(III)-mediated radical 1,2-aryl migration of α,α-diarylallylic alcohols for the isomerization to ketones is described. The Fe(acac)3–silane would convert the alkene to an alkyl radical and initiates a 1,2-aryl migration-oxidation process. Thus Fe(acac)3 serves as an olefin hydrogen atom transfer initiator and oxidant, while various allylic alcohols could isomerize to ketones in moderate to good
Nickel-Catalyzed Transformation of Aryl 2-Pyridyl Ethers via Cleavage of the Carbon–Oxygen Bond: Synthesis of Mono-α-arylated Ketones
作者:Zhong-Xia Wang、Jing Li
DOI:10.1055/s-0037-1609963
日期:2018.8
aryl 2-pyridyl ethers with propiophenone and acetophenone derivatives via C–OPy bond cleavage is performed in the presence of t-BuOLi to give mono-α-arylated ketones in moderate yields. The method is suitable for electron-rich and electron-poor ethers as well as heteroaryl ethers and tolerates a range of active functional groups. The nickel/IPr-catalyzed reaction of aryl 2-pyridyl ethers with propiophenone
Nickel‐Copper‐Catalyzed Hydroacylation of Vinylarenes with Acyl Fluorides and Hydrosilanes
作者:Yusuke Ueda、Tomohiro Iwai、Masaya Sawamura
DOI:10.1002/chem.201900822
日期:2019.7.17
The hydroacylation of vinylarenes with acylfluorides and hydrosilanes was enabled by a synergistic bimetallic Ni/Cu‐catalytic system, giving access to the corresponding branched ketone products. The reaction takes place under mild conditions at 25–80 °C and tolerates base‐sensitive functional groups such as methoxycarbonyl and acetoxy groups.