| 摘要 |
Process for the manufacture of alpha , beta -unsaturated N-substituted carboxylic acid amides of the general formula <IMAGE> (I) in which R1 represents H or CH3 R2 represents H or CH3, and Y represents a divalent straight-chain or branched organic radical having 2-30 carbon atoms, and R3 represents H or the radical of an amine of the formula -N(R4)(R5), in which R4 and R5 represent alkyl radicals having 1 to 4 carbon atoms, by reacting beta -substituted carboxylic acid amides of the formula <IMAGE> (II) in which Z represents OH or the radical R6O-, in which R6 is an alkyl radical having 1 to 4 carbon atoms, with amines of the general formula H2N-(Y)-R3 III at temperatures in the range of 100 DEG to 200 DEG C., preferably 120 DEG to 175 DEG C., with the elimination of ammonia, and heating the resulting N-substituted beta -hydroxycarboxylic or beta -alkoxycarboxylic acid amides in the presence of catalysts, water or alcohol, respectively, being split off. The water is split off at temperatures of 100 DEG -250 DEG C. with acidic catalysts such as phosphoric acid, or basic catalysts such as sodium hydroxide, and alcohol is split off at 70 DEG -150 DEG C. with basic catalysts such as sodium or potassium hydroxide. The reaction product is separated by distillation, optionally in vacuo.
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