Optically Active 1,1′-Spirobiindane-7,7′-diol (SPINOL)-Based Phosphoric Acids as Highly Enantioselective Catalysts for Asymmetric Organocatalysis
作者:Chun-Hui Xing、Yuan-Xi Liao、Jaclynn Ng、Qiao-Sheng Hu
DOI:10.1021/jo200302x
日期:2011.5.20
of optically active 1,1′-spirobiindane-7,7′-diol (SPINOL)-based phosphoricacids are described. These SPINOL-based phosphoricacids were prepared from (R)-SPINOL in three steps and exhibited excellent enantioselectivities for the reactions of indoles with aldimines and β,γ-unsaturated-α-ketoesters. Our study provides a family of promising chiral phosphoricacids to the asymmetric organocatalysis toolbox