Synthesis, characterization, and polyester dyeing performance of azo barbituric and thiobarbituric acid disperse dyes

General method for synthesis of disperse dyes 1–18

Step 1: Preparation of diazonium 2: In a 250 mL capacity conical flask, aniline derivatives (0.03 mol) were added to mixture of 15 mL conc. HC1 and 10 mL cold water and stirred for 15 min….

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