Immobilization of Diphenylamine-Linked Bis(oxazoline) Ligands and Their Application in the Asymmetric Friedel-Crafts Alkylation of Indole Derivatives with Nitroalkenes
作者:Han Liu、Da-Ming Du
DOI:10.1002/ejoc.200901434
日期:2010.4
A diphenylamine-linkedbis(oxazoline) ligand with trans-diphenyl substitution on the oxazoline rings has been immobilized onto one- to three-generation Frechet-type dendrimers and a C 3 -symmetric core structure. The catalytic activities and enantioselectivities of these new ligands were tested in the asymmetricFriedel-Craftsalkylation reactions of indolederivatives with nitroalkenes. The two types