Nickel-catalyzed Conjugate Addition of Arylboron Reagents to α,β-Unsaturated Carbonyl Compounds with the Aid of a Catalytic Amount of an Alkyne
作者:Eiji Shirakawa、Yuichi Yasuhara、Tamio Hayashi
DOI:10.1246/cl.2006.768
日期:2006.7
Alkynes in combination with a catalytic amount of a nickel complex were found to catalyze the conjugate addition of arylboron reagents to α,β-unsaturated carbonyl compounds, where use of an optical...
Antimony(III) chloride as an efficient catalyst for palladium-catalyzed hydrophenylation of α,β-unsaturated ketones and aldehydes
作者:Chan Sik Cho、Shin-ichi Motofusa、Sakae Uemura
DOI:10.1016/0040-4039(94)88333-5
日期:1994.3
A remarkable catalyticeffect of antimony(III) chloride was disclosed in palladium-catalyzed hydrophenylation of α,β-unsaturatedketones and aldehydes (Michael-type conjugate addition) with sodium tetraphenylborate in acetic acid at 25°C.
Catalytic 1,4-addition of arylsiloxanes to enones was carried out at 75 °C in the presence of a dicationicpalladium(II) catalyst in aqueous 1,4-dioxane. A nitrile-free complex generated in situ from Pd(dba)2 and Cu(BF4)2 in the presence of dppe or dppben was recognized to be the best catalyst to achieve high yields for the representative enones and enals.
Palladium-Catalyzed Conjugate Addition of Organosiloxanes to α,β-Unsaturated Carbonyl Compounds and Nitroalkenes
作者:Scott E. Denmark、Nobuyoshi Amishiro
DOI:10.1021/jo034763r
日期:2003.9.1
aryltrialkoxysilanes to alpha,beta-unsaturated carbonylcompounds (ketones, aldehydes) and nitroalkenes in the presence of SbCl(3), TBAF, AcOH, and a catalytic amount of Pd(OAc)(2), in CH(3)CN at 60 degrees C, provides the corresponding conjugate addition products in moderate to good yields. The addition of equimolar amounts of SbCl(3) and TBAF is necessary for this reaction to proceed smoothly. The arylpalladium
Addition reaction of arylboronic acids to aldehydes and α,β-unsaturated carbonyl compounds catalyzed by conventional palladium complexes in the presence of chloroform
作者:Tetsuya Yamamoto、Michiko Iizuka、Hiroto Takenaka、Tetsuo Ohta、Yoshihiko Ito
DOI:10.1016/j.jorganchem.2008.12.032
日期:2009.4
Arylboronic acids react with aldehydes and α,β-unsaturatedcarbonylcompounds in the presence of a base and a catalytic amount of a palladium(0) complex with chloroform, affording the corresponding addition products in good yields, and chiral benzhydrol was obtained with up to 43% e.e. using (S,S)-bppm as a ligand. General palladium complexes have no catalytic activity without chloroform. Because chloroform