Acylation of melamine (M) by substituted benzoyl chlorides (S-BC XC
6H
4COCl X : H, ο-,
m- and
p-NO
2 m- and
p-Cl, ο- and
p-CH
3COO, ο-,
m- and
p-CH
3O) in dioxane was investigated.
The condensation of M and S-BC in molar ratios 2 : 1-1.5 in dioxane under ref lux gave N-substituted benzoylmelamines in good yields except ο-acetoxy derivative. When triethylamine was added and molar ratios were changed to (a) 1 : 2.2-3 and (b) 1 : 4, (a) N, N'-bis (substituted benzoyl) melamines and (b) N, N', N″-tris (substituted benzoyl) melamines were obtained respectively. In the triacylation by benzoyl chloride and its
p-methoxyl derivative, corresponding N, N, N'-tris (substituted benzoyl) melamines were obtained together with N, N', N″-isomers.
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