Axially chiral phosphine–oxazoline ligands in the silver(I)-catalyzed asymmetric Mannich reaction of fluorinated aldimines with trimethylsiloxyfuran
作者:Qian-Yi Zhao、Zhi-Liang Yuan、Min Shi
DOI:10.1016/j.tetasy.2010.05.025
日期:2010.4
Axially chiral phosphine–oxazoline ligand L7, prepared from (S)-binol, was found to be a fairly effective chiral ligand in the silver(I)-catalyzed asymmetric Mannich reaction of fluorinated aldimines with trimethylsiloxyfuran to give the corresponding adducts in up to 99% yield, over 20:1 dr and 81% ee.
由(S)-比诺尔制得的轴向手性膦-恶唑啉配体L7被发现是氟化亚胺与三甲基甲硅烷氧基呋喃的银(I)催化不对称曼尼希反应中的相当有效的手性配体,最多可生成99个相应的加合物收率超过20:1的dr和81%的ee。