A Novel 1-Glycosyl-1H-triazole-Based P,N Ligand for Rhodium-Catalyzed Asymmetric Hydrosilylation of Ketones
作者:Chao Shen、Peng-Fei Zhang、Xin-Zhi Chen
DOI:10.1002/hlca.201000093
日期:2010.12
A novel class of chiral glycosyl‐triazole‐based P,N ligands were synthesized by ‘click chemistry’ and were applied to the Rh‐catalyzedasymmetrichydrosilylation of a range of substituted acetophenones. Enantioselective hydrosilylation of acetophenone gave (S)‐1‐phenylethanol in moderate enantioselectivity (72% ee) and in good conversion (93%).
used as a highly active heterogeneous catalyst to synthesize N-glycosyl-1,2,3-triazoles from glycosyl azides and alkynes. Cellulose-Cu(0) catalysed the cycloaddition reaction to produce the corresponding products in good to excellent yields in water. This heterogeneous catalyst has the advantages of high catalytic reactivity and low copper leaching. The separation and reuse of the catalyst are easy