摘要
合成了手性Salen Mn(Ⅲ)配合物,利用红外光谱、元素分析对配合物结构进行表征。以NaOC l为氧源考察了反应体系pH值、溶剂以及轴向配体对配合物催化苯乙烯不对称环氧化反应的影响。实验较佳的反应条件下:苯乙烯5 mmol,催化剂0.1 mmol,缓冲液pH值为11.30,以CH2C l2为溶剂并加入1 mmol 4-苯基吡啶氧化物作轴向配体,0℃反应,苯乙烯转化率达100%,产物对映体过量值(ee)为42%。
A new chiral Mn （Ⅲ） Salen complex was synthesized and characterized by FT-IR and elemental analysis. The complex was used as catalyst for enantioselective epoxidation of styrene with NaOCl as oxidant in the presence of axial base. The effects of pH value, solvents and axial bases on the asymmetric epoxidation of styrene were investigated： Conversion of styrene and ee of the epoxides could reach 100% and 42% respectively when the reaction was run at 0 ℃, the catalyst loading is 0. 1 mmol, and pH value of 1.0 mmol 4-PPNO in buffered CH2Cl2 is 11.30.
出处
《应用化学》
CAS
CSCD
北大核心
2006年第6期688-690,共3页
Chinese Journal of Applied Chemistry
基金
国家自然科学基金(20376017)资助项目
