期刊论文

中文

应用化学

1000-0518

2006

23

7

718-723

10.3969/j.issn.1000-0518.2006.07.005

国家自然科学基金资助项目（20436010）；

本校为其他机构

合成了芳环上含不同取代基的Schiff碱配体（水杨醛缩组氨酸（H2L^1）、5-溴水杨醛缩组氨酸（H2L^2）、5-硝基水杨醛缩组氨酸（H2L^3））及其铜（Ⅱ）配合物，研究了其作为催化剂应用于催化分子氧氧化伊紫罗兰酮制备4-氧代-β-紫罗兰酮中的行为。提出了可能的催化反应机理。结果表明，取代基影响铜（Ⅱ）配合物的催化性能，其催化效果为CuL^2〉CuL^1〉CuL^3。吡啶可增强其催化活性。以CuL^2作催化剂，当反应时间为10h、反应温度为75℃、催化剂用量为1．6％（摩尔分数）、O2气压力为1MPa、添加摩尔分数为30％吡啶时，4-氧代-β-紫罗兰酮的收率为50．2％，纯度超过98．5％。氧化产物、Schiff碱配体...

A series of L-histidine Schiff bases that include Sal-His（ H2L^1 ）, Br-Sal-His（ H2L^2 ）, NO2-Sal-His （H2L^3） and their Cu （ Ⅱ ） complexes were synthesized, and the catalytic behavior of Schiff-base-Cu for the oxidation of β-ionone to 4-oxo-β-ionone as well as the effects of substitutents on these properties were examined. The effects of reaction temperature, reaction time, molar ratio of catalyst to β-ionone, the amount of pyridine additive and O2 pressure on the catalytic activity of the various catalysts were optimized and a proba...