作者:Qunsheng Guo、John Cong-Gui Zhao
DOI:10.1016/j.tetlet.2012.01.108
日期:2012.4
alkaloid-derived chiral primary amines were applied as the catalyst for the cross aldol reaction of isatins with acetaldehyde. With the quinine-derived amine catalyst 3, the desired aldol products were obtained in high yields and good enantioselectivities (up to 93% ee) under the optimized conditions. Although other enolizable aldehydes and ketones may also be applied in this reaction, the ee values obtained
几种金鸡纳生物碱衍生的手性伯胺被用作催化剂,用于靛红与乙醛的交叉羟醛反应。使用奎宁衍生的胺催化剂3,在优化的条件下以高收率和良好的对映选择性(高达93%ee)获得了所需的醛醇产物。尽管在该反应中也可以使用其他可烯化的醛和酮,但是所得的ee值通常较低。提出了一种机制来解释该反应中主要对映异构体的形成。