チアニン系色素の研究 (第13報)

各種色素間の母体変換に就いて

抄録

Application of heterocylic quaternary salts possessing methyl group in 2-position to the symmetric methine-oxonols and benzal compounds resulted in conversion to merocarbocyanine and styryl dyes. Unsymmetric carbocyanines possessing a pyridine ring and quinoline ring and styryl dyes possessing α-picoline methiodide undergo exchange of the parent nuclei by the application of a quinaldine salt, the pyridine ring exchanging with the quinoline ring in each dye. In a similar manner, application of thiobarbituric acid to methine-oxonol composed of barbituric and thiobarbituric acids and the benzal compound containing barbituric acid resulted in the exchange of barbituric acid with thiobarbituric acid. The same exchange of the parent nuclei was also found to occur in merocarbocyanines possessing a pyridine ring or barbituric acid.