title: Polymer-supported bisBINOL ligands for the immobilization of multicomponent asymmetric catalysts.
abstract: [reaction: see text] Polymer-supported bisBINOL ligands were successfully utilized for the immobilization of multicomponent asymmetric catalysts. The polymer-supported Al-Li-bis(binaphthoxide) (ALB) catalyst was more effective than the dendrimer-supported ALB in the Michael reaction of 2-cyclohexen-1-one with dibenzyl malonate affording the adduct in 91% yield with 96% ee. The polymer was also effective for the immobilization of a mu-oxodititanium complex that promoted carbonyl-ene reaction of ethyl glyoxalate with alpha-methyl styrene to provide the adduct with up to 98% ee.
authors.affiliation: The Institute of Scientific and Industrial Research (ISIR), Osaka University, Mihogaoka, Ibaraki, Osaka 567-0047, Japan.
authors.forename: Tetuya
authors.initials: T
authors.lastname: Sekiguti
authors.forename: Yoshimasa
authors.initials: Y
authors.lastname: Iizuka
authors.forename: Shinobu
authors.initials: S
authors.lastname: Takizawa
authors.forename: Doss
authors.initials: D
authors.lastname: Jayaprakash
authors.forename: Takayoshi
authors.initials: T
authors.lastname: Arai
authors.forename: Hiroaki
authors.initials: H
authors.lastname: Sasai