4-Aminophenacylpyridinium chloride hydrochloride → 4-Aminophenacylpyridinium chloride

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Reaction Steps

Two grams of the obtained 4-aminophenacylpyridinium chloride hydrochloride was dissolved in 15 g of water, and 4.5 g of a basic ion exchange resin (Amberlite IRA400-OH) was added thereto. The mixture was stirred, and filtered to remove the ion exchange resin. Thereby an aqueous solution of 4-aminophenacylpyridinium chloride was obtained. The aqueous solution of 1.3 g of 4-aminophenacylpyridinium chloride in 25 g of water was refluxed with 1 g of silver nitrate for 90 minutes. The formed precipitate was removed by filtration. To the filtrate, was added 5 g of carbon black having a specific surface area of 200 m2/g, and DBPA of 122 mL/100 g. The mixture was heated to about 80° C. Thereto, were added 0.52 g of concentrated hydrochloric acid, and a solution of sodium nitrite in a small amount of water, successively. The dispersion was stirred further for 1.5 hours. Thereby, a diazonium salt having a NN+C6H4COCH2(N+C5H5) group of the structure shown below was formed. This formed salt reacted with the carbon black.

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