Bis-aminopyridinium salts as phase transfer catalysts for aromat

Details Bis-aminopyridinium salts as phase transfer catalysts for aromat Bis-aminopyridinium salts as phase transfer catalysts for aromat

1986-04-30

1987-07-21

Schwartz, Richard A.

Organic compounds -- part of the class 532-570 series

Organic compounds

Heterocyclic carbon compounds containing a hetero ring...

544 55, 544 585, 544280, 544350, 546113, 548136, 548153, 548323, 548451, 548453, 548476, 548480, 568585, 568586, C07D20948, C07D40310, C07D40312

Patent

active

046819495

ABSTRACT:
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.

REFERENCES:
patent: 4273712 (1981-06-01), Williams
patent: 4513141 (1985-04-01), Brunelle et al.
patent: 4554357 (1985-11-01), Verbicky
patent: 4595760 (1986-06-01), Brunelle

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