A series of novel types of immobilized chiral salen Mn(III) on different organic polymer-inorganic hybrid crystalline zinc phosphonate-phosphate act as catalysts for asymmetric epoxidation of unfunctionalized olefins

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

来源：Catalysis Science & Technology, 2012, 2(5): 1040-1050.

DOI：10.1039/c2cy00502f

A novel type of layered crystalline organic polymer-inorganic hybrid material, zinc poly(styrene-phenylvinylphosphonate)-phosphate (ZnPS-PVPA) was synthesized and an array of new heterogeneous catalysts were gained by grafting chiral salen Mn(III) onto the ZnPS-PVPA, and characterized by FT-IR, diffusion reflection UV-vis, AAS, N-2 volumetric adsorption, SEM, TEM, XPS, XRD and TG. The immobilized chiral salen Mn(III) catalysts exhibited higher chiral induction in the asymmetric epoxidation of alpha-methylstyrene and indene with m-CPBA and NaIO4 as oxidants than the corresponding homogeneous catalyst did (ee, 499% vs. 54% and 499% vs. 65%). And the heterogeneous catalysts are relatively stable and can be recycled nine times in the asymmetric epoxidation of alpha-methylstyrene. Furthermore, this novel type of catalyst can also be efficiently used in large-scale reactions with superior catalytic ability being maintained at the same level, which possessed the potentiality for application in industry.

• 出版日期2012
• 单位中国科学院长春应用化学研究所; 西南大学