| 含多羟基的手性Salen Mn(Ⅲ)配合物的合成与催化性质 |
| Synthesis and Catalysis of Chiral Salen Mn(Ⅲ) Complexes Containing Multihydroxyl Substituents |
|
| 摘要: 合成并表征了2个含有多羟基官能团的新型手性Salen((R，R)-N，N′-[2，2′-双(次氨基次甲基)]双[4-(亚甲基-N，N′-二乙醇氨基)-6-(1，1-二叔丁基)苯酚]-1，2-环己二胺) (5)和(R，R)-N，N′-[2，2′-双 (次氨基次甲基)]双[4-(亚甲基-N，N′-二乙醇氨基)-6-(1，1-二叔丁基)苯酚]-1，2-二苯基乙二胺) (6))的Mn(Ⅲ)配合物7 |
| 关键词: Salen Mn(Ⅲ) 不对称环氧化 亲水取代基 离子液 |
| 基金项目: |
| Abstract: Two chiral Salen((R,R)-N,N′-[2,2′-bis(nitrilomethylidyne)] bis[4-(methylene-N,N′-diethanolamino)-6-(1,1-dinethylethyl)phenoloto]-1,2-cyclohexanediamine and ((R,R)-N,N′-[2,2′-bis(nitrilomethylidyne)]bis[4-(methyl-ene-N,N′-diethanol amino)-6-(1,1-dinethylethyl)phenoloto]-1,2-diphenyldiamine) Mn(Ⅲ) complexes 7 and 8 containing multihydroxyl groups were synthesized and employed in the asymmetric epoxidation of unfunctionalized alkene with NaClO as oxidant in the presence of pyridine N-oxide(PyNO) as co-catalysts in CH2Cl2/H2O. The epoxidations of styrene give enantioselectivities from 32.3% to 52.9% and the epoxidations of indene give ee from 72.8% and 89.7%; When 10mol% catalyst based on the olefins was used, the reaction can be completed within half an hour. Catalyst 8 could be effectively recycled for 3 times without a significant decrease of selectivity in the presence of ionic liquid [BMIM]PF6 ([BMIM]+ = 1-butyl-3-methylimidazolium). |
| Keywords: Salen Mn(Ⅲ) asymmetric epoxidation hydrophilic substituents ionic liquid |
| |
| 摘要点击次数: 1536 |
| 全文下载次数: 1793 |
| 项 萍,陈龙海,邬金才,唐 宁.含多羟基的手性Salen Mn(Ⅲ)配合物的合成与催化性质[J].无机化学学报,2009,25(3):391-396. |
| 查看全文 查看/发表评论 下载PDF阅读器 |
| Support information: |
|
|
|
|
|
|
