Studies on Aluminum Complex Compound of PAS. I. Synthesis of Alumino-p-aminosalicylic Acid and its Calcium Salt

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In order to improve some of the defects of PAS preparations now being used, such as the bad taste, inconvenience of administration, and occurrence of side effects, a new complex compound of PAS and aluminum, H_2[(C_7H_5O_3N)_2Al(OH)(H_2O)] was synthesized by the application of 1 mole of aluminum chloride to 2 moles of PAS-sodium in aqueous solution, in the presence of 1 mole of sodium hydrogen carbonate. This substance was found to be a trihydrate or hexahydrate at room temperature. This new complex, Al-PAS, is a dibasic acid and occurs as colorless, fine crystalline powder, without odor and slightly sweet to the taste, becoming astringent later, and dissolves in 2 moles of sodium hydroxide or ammonia water. This alumino-p-aminosalicylic acid was dissolved in 2 moles of ammonia water and 1 mole of calcium chloride was added, from which colorless and tasteless crystals were obtained. Its analytical values agreed with the formula of Ca[(C_7H_5O_3N)_2Al(OH)(H_2O)]・7H_2O.
公益社団法人日本薬学会の論文
1959-10-20