Nickel-Catalyzed Arylative Carboxylation of Alkynes with Arylmagnesium Reagents and Carbon Dioxide Leading to Trisubstituted Acrylic Acids
作者:Sheng Wang、Chanjuan Xi
DOI:10.1021/acs.orglett.8b01693
日期:2018.7.6
Nickel-catalyzed arylcarboxylation of alkynes with arylmagnesium reagents and carbondioxide (CO2, 1 atm) was realized in one pot. Various trisubstitutedacrylicacids within an aryl group at the β-position have been prepared efficiently with good regioselectivity under mild conditions. The resulting products could be further transformed to benzoannelated cycles retaining CO2 as a one-carbon synthon
Intramolecularly Activated Vinylsilanes: Fluoride-Free Cross-Coupling of (<i>Z</i>)-β-(Trialkylsilyl)acrylic Acids
作者:Mitsuru Shindo、Kenji Matsumoto、Kozo Shishido
DOI:10.1055/s-2004-836033
日期:——
The fluoride-free palladium-catalyzed cross-coupling reaction of trialkyl(vinyl)silanes activated by the intramolecular pentacoordination of carboxylic acid at the Z-β-position is described.
Catalytic asymmetric hydrogenation of β-disubstituted α-phenylacrylic acids asymmetric synthesis of carboxylic acids containing two vicinal chiral carbon centers
作者:Tamio Hayashi、Norio Kawamura、Yoshihiko Ito
DOI:10.1016/s0040-4039(00)82242-x
日期:1988.1
Hydrogenation of trisubstitutedacrylicacids (()- and ()MeC(R)CPhCOOH: R = CD3, Et, Ph) in the presence of a chiral (aminoalkyl)ferrocenylphosphine-rhodium catalyst installed asymmetric configurations at two vicinal carbons at once giving optically active carboxylic acids of high enantiomeric purities (80% ee).
三取代丙烯酸(()-和()MeC(R)aCPhCOOH:R = CD 3,Et,Ph)在手性(氨基烷基)二茂铁基膦-铑催化剂存在下,在两个邻位碳上以不对称构型存在下进行氢化一次得到高对映体纯度(80%ee)的光学活性羧酸。