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 asymmetric direct crossed-aldol reaction 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
一种新型的基于二芳基脯
氨醇的新型催化剂,在新开发的
离子液体负载的(ILS)
苯甲酸作为助催化剂的存在下,含有二辛基
氨基,是一种有效的催化体系,用于
乙醛的不对称直接交叉-羟醛反应在盐
水中的
水性介质中。对于所研究的反应,催化剂的载量可以降低至5mol%;优选地,催化剂的载量可以降低至5mol%。对于多种芳族醛,还实现了高收率(高达97%)和高对映选择性(高达92%ee)。