| 摘要 |
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 compounds (e.g., 4-nitro-N-methylphthalimide). The bis-aminopyridinium salts may be prepared by the reaction of aminopyridines with bis-carbonium ion-generating compounds such as dibromoalkanes.
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