Scandium trisdodecylsulfate (STDS). A new type of lewis acid that forms stable dispersion systems with organic substrates in water and accelerates aldol reactions much faster in water than in organic solvents
作者:Shū Kobayashi、Takeshi Wakabayashi
DOI:10.1016/s0040-4039(98)01081-8
日期:1998.7
A newtype of Lewisacid, scandium trisdodecylsulfate (STDS), was prepared. In the presence of a catalytic amount of STDS, aldol reactions of silyl enol ethers with aldehydes proceeded smoothly in water without using any organic solvents. It was proven that stable dispersion systems including the catalyst and organic substrates were formed in water and that catalytic activity in water was much higher
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