具有相转移能力的PEG固载手性Salen Mn(Ⅲ)配合物及催化苯乙烯环氧化反应  

Asymmetric Epoxidation of Styrene Catalyzed by Salen Mn(Ⅲ) Complexes Immobilized on PEG with Phase Transfer Capability

作　　者：周建波[1] 熊东路[1] 伏再辉[1] 邹帅[1] 崔小莹[1] 徐超[1] ZHOU Jian-bo XIONG Dong-lu FU Zai-hui ZOU Shuai CUI Xiao-ying XU Chao(Department of Basic Medical Science, Changsha Medical University, Changsha 410219, China)

机构地区：[1]长沙医学院基础医学院,中国长沙410219

出　　处：《湖南师范大学自然科学学报》2017年第4期45-50,共6页Journal of Natural Science of Hunan Normal University

基　　金：湖南省教育厅资助项目(16C0154;14C0121;16C0155);湖南省大学生研究性学习和创新性实验计划项目(湘教通[2016]283号)

摘　　要：通过化学接枝或轴向配位将手性salen Mn(Ⅲ)配合物固载到具有溶剂控制相转移能力的PEG-400和PEG-800上.用UV-Vis,FT-IR,GPC和化学分析等表征手段对所得催化剂(PTC-1,PTCC-2,PTCC-3)的结构和性质进行表征.并以苯乙烯为反应底物,考察3种催化剂的催化性能.实验结果表明:3种催化剂能提供与传统均相手性salen Mn(Ⅲ)配合物相当的转化率和选择性,且对映体过量百分率(e.e.)略高;PTC-1和PTCC-2能重复使用3次,但PTCC-3重复使用性能不佳.Salen Mn （Ⅲ） complexes were immobilzed onto PEG-400 and PEG-800 which had solvent controlled phase transfer capabilities by chemical grafting or axial coordination.The obtained catalysts （PTC-1, PTCC-2, PTCC-3） were characterized by UV-Vis, FT-IR, GPC and chemical analysis.Their catalytic activity was evaluated by asymmetric epoxidation of styrene.Our results showed that PTC-1, PTCC-2 and PTCC-3 offered similar conversion and selectivity, and slightly higher enantiomeric excess （e.e.） value compared to the traditional chiral salen Mn （Ⅲ）.PTC-1 and PTCC-2 could be recycled for 3 times, but PTCC-3 is poor in reusability.

关 键 词：手性SALEN Mn(Ⅲ)配合物 溶剂相转移催化剂 环氧化反应 PEG 

分 类 号：O614.81[理学—无机化学]