Fine-Tuning the Structures of Chiral Diamine Ligands in the Catalytic Asymmetric Aldol Reactions of Trifluoromethyl Aromatic Ketones with Linear Aliphatic Ketones
作者:Hua Zong、Huayin Huang、Guangling Bian、Ling Song
DOI:10.1021/jo5022103
日期:2014.12.5
series of N,N-disubstituted chiral diamine ligands on the catalytic asymmetric aldol reactions between trifluoromethyl ketones and linear aliphatic ketones for the construction of chiral trifluoromethyl tertiary alcohols. A highly efficient primary–tertiary diamine ligand derived from (1R,2R)-1,2-diphenylethylenediamine was developed, which catalyzed the reactions with up to 99% yield and up to 94%
在这项工作中,我们彻底研究了一系列N,N-二取代的手性二胺配体的结构分化对三氟甲基酮和线性脂肪族酮之间催化不对称醛醇缩合反应的影响,以构建手性三氟甲基叔醇。开发了一种高效的由(1 R,2 R)-1,2-二苯基乙二胺衍生的伯叔叔胺配体,该催化剂在对甲苯磺酸的存在下催化反应的产率高达99%,对映选择性高达94%。(TsOH),使用甲苯作为溶剂。