22147-30-4Relevant academic research and scientific papers
Enantioselective incorporation of carbon dioxide into epoxides catalyzed by optically active cobalt(II) complexes
Yamada, Wataru,Kitaichi, Yasunori,Tanaka, Hirotaka,Kojima, Tomohide,Sato, Mitsuo,Ikeno, Taketo,Yamada, Tohru
experimental part, p. 1391 - 1401 (2009/06/20)
The enantioselective chemical fixation of CO2 into an epoxide was developed using an optically active ketoimi-natocobalt(II) complex as a chiral Lewis acid. In the presence of a catalytic amount of the cobalt complex and amine base, enantioselective CO2 fixation with an epoxide proceeded with kinetic resolution to afford the corresponding carbonate along with unreacted epoxide, both of which were optically active. To improve their enantioselectivities, the ligand structures of the cobalt complexes and amine bases were examined. Thus, the optimized catalytic system was successfully applied to various epoxides to obtain the corresponding optically active cyclic carbonates and to recover epoxides with good-to-high enantioselectivities.
