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
Ketone homologation to produce α-methoxyketones: application to conduritol synthesis
作者:Neil Phillipson、Michael S. Anson、John G. Montana、Richard J. K. Taylor
DOI:10.1039/a703073h
日期:——
The scope of Trost’s sulfone homologation procedure for the conversion of ketones into their α-methoxylated higher homologues has been dramatically expanded. The use of zirconium (or hafnium) tetrachloride in the hydroxy sulfonerearrangement step gives good yields with the adducts of aryl alkyl ketones, dialkyl ketones and cycloalkanones, and the rearrangement occurs with total regioselectivity. Mechanistic
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.