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Citation: CHEN Jun-Xian, FU Xiang-Kai, SHEN Hong-Sheng, TU Xiao-Bo, GONG Bi-Wei, ZOU Xiao-Chuan. Preparation of Aminated ZPS-IPPA Axial Coordinated Chiral Salen Mn(Ⅲ) and its Catalysis for α-Methylstyrene Asymmetric Epoxidation Reaction[J]. Chinese Journal of Applied Chemistry, ;2009, 26(10): 1174-1179. shu

Preparation of Aminated ZPS-IPPA Axial Coordinated Chiral Salen Mn(Ⅲ) and its Catalysis for α-Methylstyrene Asymmetric Epoxidation Reaction

1.
College of Chemistry and Chemical Engineering, Southwest University;Chongqing Key Laboratory of Applied Chemistry, Chongqing 400715

Corresponding author: FU Xiang-Kai,
Received Date: 6 October 2008
Available Online: 15 January 2009
Fund Project: 重庆市经委工业专项资金项目(2008-65) (2008-65)

Chiral Salen Mn(Ⅲ) complex was axially coordinated on diamine or polyamines modified Zirconium poly(styrene-isopropenyl phosphonate)-phosphates(ZPS-IPPA) by a covalent grafting method. All the supported heterogeneous chiral Salen Mn(Ⅲ) complexes prepared were characterized by FT-IR,diffusion reflection UV-Vis,XPS,SEM and TEM. The supported catalyst was applied to the enantioselective epoxidation of α-methylstyrene with NaClO and m-CPBA as oxidants. The results confirm that the activity of the supported catalyst was lower than that of the homogeneous chiral Salen Mn( Ⅲ). However,its enantioselecti-vity was higher than that of the homogeneous one. A conversion of 68% and an e.e. of 99% of epoxide were obtained when α-methylstyrene was oxidized by NaClO for 24 h at 0 ℃ in the presence of 4-PPNO. The catalysts were easily recovered by filtration and could be reused for at least eight times with little loss of activity and enantioselectivity.
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