Binaphthol-derived phosphoric acids as efficient chiral organocatalysts for the enantiomer-selective polymerization of rac-lactide.
A high enantiomer-selectivity for the polymerization of rac-lactide was achieved using chiral binaphthol-derived monophosphoric acids as organocatalysts. During the polymerization, d-lactide (DLA) preferentially polymerized via kinetic resolution with the maximum selectivity factor (kD/kL) of 28.3. The selective polymerization of DLA was derived from a dual activation, i.e., monomer activation and chain-end activation.
Graduate School of Chemical Sciences and Engineering, and Faculty of Engineering, Hokkaido University, Sapporo, 060-8628, Japan. satoh@poly-bm.eng.hokudai.ac.jp.
Kosuke
K
Makiguchi
Takuto
T
Yamanaka
Toyoji
T
Kakuchi
Masahiro
M
Terada
Toshifumi
T
Satoh