Organocatalytic Direct Asymmetric Crossed-Aldol Reactions of Acetaldehyde in Aqueous Media
作者:Yupu Qiao、Qiankun Chen、Sirong Lin、Bukuo Ni、Allan D. Headley
DOI:10.1021/jo302442g
日期:2013.3.15
dioctylamino group in the presence of a newly developed ionic liquid supported (ILS) benzoic acid as cocatalyst, is shown to be an effective catalytic system for the asymmetricdirectcrossed-aldolreaction of acetaldehyde in aqueous media using brine. For the reactions studied, the catalyst loading could be reduced to 5 mol %; high yields (up to 97%) and high enantioselectivities (up to 92% ee) were also