The reaction of alkyl phenyl ethers with sodium chlorite in dichloromethane in the presence of a (salen)manganese(III) complex and alumina preloaded with a small amount of water afforded monochlorination products with unusually high para selectivities under mild conditions. The NaClO2-based biphasic system can also be successfully used for the regioselective monochlorination of substituted anisoles and polymethoxybenzenes. Keywords: aromatic chlorination, alkyl aryl ethers, sodium chlorite, (salen)manganese(III) complex, alumina.
烷基苯醚与
氯化钠在
二氯甲烷中,在(salen)
锰(III)配合物和预加载少量
水的氧化铝存在下,在温和条件下生成了具有异常高对位选择性的单
氯化产物。基于NaClO
2的两相体系也可以成功用于对取代
苯酚和多
甲氧基苯的区域选择性单
氯化。关键词:芳香族
氯化、烷基芳基醚、
氯化钠、(salen)
锰(III)配合物、氧化铝。