Metal-Bridged Polymers as Insoluble Multicomponent Asymmetric Catalysts with High Enantiocontrol: An Approach for the Immobilization of Catalysts without Using any Support

Authors


  • This work was supported by a Grant-in-Aid for Scientific Research from the Ministry of Education, Culture, Sports, Science and Technology, Japan. We thank the technical staff in the Materials Analysis Center of ISIR, Osaka University.

Abstract

original image

Immobile without support: The first synthesis of chiral Al-bridged and Ti-bridged polymers by a metal-mediated self-assembly of (R,R)-6,6′-bi(binol) (binol=1,1′-bi-2-naphthol), which bears two pairs of phenolic hydroxy groups at the opposite sides in the molecule, is described (see scheme, X=OH or O). The polymers are found to promote asymmetric Michael reaction and carbonyl–ene reaction with high enantioselectivity and can be reused.

Ancillary