Novel bis-aminopyridinium salts are useful as phase transfer catalysts in the preparation of aromatic ethers by the reaction of hydroxyaromatic compound alkali metal salts (e.g., bisphenol A disodium salt) with activated halo- or nitro-substituted aromatic coumpounds (e.g., 4-nitro-N-methyl- phthalimide). The bis-aminopyridinium salts may be prepared by the reaction of aminopyridines with bis-carbonium ion-generating compounds such as dibromoalkanes.
新型双
氨基吡啶鎓盐可作为相转移催化剂,通过羟基芳香族化合物碱
金属盐(如双
酚 A 二钠盐)与活化的卤代或硝代芳香族偶化合物(如 4-硝基-N-甲基邻苯二甲
酰亚胺)反应制备芳香族醚。 双
氨基吡啶鎓盐可通过
氨基吡啶与产生双羰基离子的化合物(如二
溴烷烃)反应制备。