چكيده لاتين :
The solid–solid reactions of electron-donor compounds, such as:
barbituric acid (1a), thiobarbituric acid (1b), 1,3-dimethyl barbituric
acid (1c), phenol (1d) and resorcinol (1e) with diazotized o-nitroaniline
(3), m-nitroaniline (4) and p-nitroaniline (5) catalyzed by p-toluenesulfonic acid
(2) afford azo dyes by grinding in good yields. This new method totally avoids
the use of inorganic acids, alkalies, toxic and/or expensive solvents in
diazotization and diazo coupling reactions. Prog. Color Colorants Coat. 2(2009),
61-70. © Institute for Color Science and Technology
