Palladium-Catalyzed Mono-α-arylation of Carbonyl-Containing Compounds with Aryl Halides using DalPhos Ligands
作者:Sarah M. Crawford、Pamela G. Alsabeh、Mark Stradiotto
DOI:10.1002/ejoc.201200951
日期:2012.10
We report the extension and optimization of the [Pd(cinnamyl)Cl]2/DalPhos catalyst system, previously found effective for the mono-α-arylation of acetone, to the mono-α-arylation of a variety of carbonyl-containing compounds with aryl halides and heteroaryl halides. Aryl methyl ketones, heteroaryl methyl ketones, propiophenones, malonates, and methoxyacetone can be α-arylated under relatively mild
α-Methoxyketone synthesis via ketone homologation: ZrCl<sub>4</sub>-mediated hydroxy sulfone rearrangements
作者:John G. Montana、Neil Phillipson、Richard J. K. Taylor
DOI:10.1039/c39940002289
日期:——
The adducts between ketones and the anion derived from [(methoxymethyl)sulfonyl]benzene undergo efficient, regioselective rearrangement to give α-methoxyketones when treated with ZrCl4 and HfCl4; this new procedure allows the sulfone-mediated homologation methodology to be applied to monocyclic and acyclic ketones.
A unique 1,2-shift selectivity in 2-hydroxypropiophenone dimethylacetals: generation of new methodologies for methyl-2-arylpropanoates and 1,2-carbonyl transposition
作者:H.R. Sonawane、B.S. Nanjundiah、D.G. Kulkarni、Jaimala R. Ahuja
DOI:10.1016/s0040-4020(01)86104-4
日期:1988.1
α -Hydroxydimethylacetals I have been shown to undergo two different rearrangements involving highly selective 1,2-shifts under mild conditions. When treated with Ph3P/CCl4, in the presence of pyridine, I were cleanly transformed via 1,2-aryl shifts into methyl 2-arylpropanoates, an important class of anti-inflammatory agents; a pronounced substituent effect has been observed in this rearrangement
已经显示出α-羟基二甲基乙缩醛I在温和条件下经历了两种不同的重排,包括高度选择性的1,2-移位。当用Ph 3 P / CCl 4处理时,在吡啶的存在下,I通过1,2-芳基转移干净地转化为重要的一类抗炎药2-芳基丙酸甲酯;在这种重排中观察到明显的取代作用。
Bakker,B.H. et al., Recueil des Travaux Chimiques des Pays-Bas, 1975, vol. 94, p. 64 - 69
作者:Bakker,B.H. et al.
DOI:——
日期:——
Montana John G., Phillipson Neil, Taylor Richard J. K., J. Chem. Soc. Chem. Commun, (1994) N 19, S 2289-2290
作者:Montana John G., Phillipson Neil, Taylor Richard J. K.