Asymmetric epoxidation of α,β-unsaturated ketones catalyzed by silica-grafted poly-(l)-leucine catalysts
作者:Hua Yi、Gang Zou、Qiang Li、Qun Chen、Jie Tang、Ming-yuan He
DOI:10.1016/j.tetlet.2005.06.096
日期:2005.8
A practical procedure has been developed for grafting poly(aminoacid) on silica gel as an efficient and recoverable catalyst in the Juliá–Colonna asymmetricepoxidation with high enantioselectivities. Separation and recovery of the catalyst of poly(aminoacid) have been remarkably improved by grafting on silica gel without a significant loss of enantioselectivity and activity.