title: Immobilization of heterobimetallic multifunctional asymmetric catalyst
abstract: Immobilization of an asymmetric AlLibis(binaphthoxide) catalyst (ALB) is described. The immobilized ALBs (poly-ALBs) are readily prepared from polymeric BINOL derivatives and LiAlH(4). The combined use of 9 mol % of BuLi with ca. 10 mol % (as a monomeric catalyst) of 6,6'-aryl-tethered poly-ALB gave the Michael adducts with up to 93% ee. After completion of the reaction, the insoluble catalyst was recovered in air and is reusable.
authors.affiliation: The Institute of Scientific and Industrial Research (ISIR), Osaka University, Ibaraki, Osaka 567-0047, Japan, and Department of Chemistry, University of Virginia, Charlottesville, Virginia 22901, USA.
authors.initials: T
authors.lastname: Arai
authors.initials: QS
authors.lastname: Hu
authors.initials: XF
authors.lastname: Zheng
authors.initials: L
authors.lastname: Pu
authors.initials: H
authors.lastname: Sasai