title: High-molecular-weight polyquinoxaline-based helically chiral phosphine (PQXphos) as chirality-switchable, reusable, and highly enantioselective monodentate ligand in catalytic asymmetric hydrosilylation of styrenes.
abstract: A polyquinoxaline-based helical polymer ligand bearing both helical-sense-determining chiral side chains and coordinating diarylphosphino side chains exhibits solvent-dependent formation of P- or M-helical structures, with which either the S- or R-hydrosilylation product was obtained with high (>93% enantiomeric excess) enantioselectivities.
authors.affiliation: Department of Synthetic Chemistry and Biological Chemistry, Graduate School of Engineering, Kyoto University, Katsura, Nishikyo-ku, Kyoto 615-8510, Japan.
authors.forename: Takeshi
authors.initials: T
authors.lastname: Yamamoto
authors.forename: Tetsuya
authors.initials: T
authors.lastname: Yamada
authors.forename: Yuuya
authors.initials: Y
authors.lastname: Nagata
authors.forename: Michinori
authors.initials: M
authors.lastname: Suginome