【摘要】 利用丙氨酸和水杨醛合成了席夫碱Mn(Ⅲ)配合物(SalAlaMn)。以分子氧为氧源,异丁醛为共还原剂,考察了反应温度、时间、催化剂量、异丁醛量、溶剂量对SalAlaMn催化环己烯环氧化反应催化性能的影响。结果表明,最佳反应条件即环己烯25mL,催化剂01mmol,异丁醛45mL,乙腈60mL,温度35℃,反应时间10h时,环己烯的转化率为983%,环氧环己烷的选择性为706%。更多还原

【Abstract】 The alanine Schiff base Mn(Ⅲ) complex(Sal Ala Mn) was synthesized from Mn(OAC) 2 and the ligand obtained from the reaction of alanine with salicylaldehyde. The effects of reaction temperature and time, amounts of catalyst and isobutylaldehyde, volume of solvent on the aerobic epoxidation of cyclohexene were studied. The conversion of cyclohexene was 98 3% with a selectivity of 70 6% of cyclohexene epoxide when 2 5 mL of cyclohexene, 0 1 mmol of catalyst , 4 5 mL of isobutylaldehyde and 60 mL of acetonitrile were charged, and the reaction was run at 35 ℃ for 10 h.更多还原