A high efficient large-scale asymmetric epoxidation of unfunctionalized olefins employing a novel type of chiral salen Mn(III) immobilized onto layered crystalline aryldiamine modified zinc poly(styrene-phenylvinylphosphonate)-phosphate

作者：Huang, Jing; Fu, Xiangkai^*; Wang, Gang; Ge, Yaqin; Miao, Qiang

来源：Journal of Molecular Catalysis A: Chemical , 2012, 357: 162-173.

DOI：10.1016/j.molcata.2012.02.008

• Chiral Mn(III) salen
• Zinc poly(styrene-phenylvinylphosphonate)-phosphate
• Aryldiamine modified
• Heterogeneous catalyst
• Asymmetric epoxidation

A series of chiral salen Mn(III) catalysts immobilized onto aryldiamine modified ZnPS-PVPA with different ratio of phosphonate/phosphate for asymmetric epoxidation were synthesized and characterized by FT-IR, diffusion reflection UV-Vis, MS, N-2 volumetric adsorption, SEM, TEM, XPS, XRD and TG. The supported catalysts displayed superior catalytic activities in the asymmetric epoxidation of alpha-methylstyrene and indene with m-CPBA and NaIO4 as oxidants. Moreover, the heterogeneous catalysts were relatively stable and could be recycled nine times in the asymmetric epoxidation of alpha-methylstyrene. Furthermore, this novel type of catalyst could also be validly used in large-scale reactions with superior catalytic disposition being maintained at the same level, which possessed the potentiality for application in industry.

• 出版日期2012-5
• 单位中国科学院长春应用化学研究所; 西南大学