Hydrophobic polymer-supported scandium catalyst for carbon–carbon bond-forming reactions in water
作者:Shinya Iimura、Kei Manabe、Shū Kobayashi
DOI:10.1016/j.tet.2004.06.083
日期:2004.8
that a hydrophobic polymer-supported scandium(III) catalyst prepared from sulfonated polystyrene resin is an effective catalyst for carbon–carbon bond-forming reactions such as Mukaiyamaaldolreactions in water. According to studies on loading levels of scandium, hydrophobicity of the catalyst is a key for the efficient catalysis. The scandium catalyst was successfully recovered and reused. Several
Repeated Use of the Catalyst in Ln(OTf)<sub>3</sub>-Catalyzed Aldol and Allylation Reactions
作者:Shu Kobayashi、Iwao Hachiya、Yoshinori Yamanoi
DOI:10.1246/bcsj.67.2342
日期:1994.8
triflate)-catalyzed aldol reactions of silyl enol ethers with aldehydes and allylation reactions of tetraallyltin with aldehydes proceeded smoothly in a water–ethanol–toluene system. The reactions proceeded much faster in the above solvent than in water–tetrahydrofuran. Repeated use of the catalyst in these reactions was realized by a very simple procedure.