Continuous method for producing amides of aromatic...

Details Continuous method for producing amides of aromatic... Continuous method for producing amides of aromatic...

C - Chemistry, Metallurgy

07

C

C07C 231/02 (2006.01) C07C 233/65 (2006.01) C07C 235/60 (2006.01) C07D 213/82 (2006.01)

Patent

CA 2720319

The invention relates to a continuous method for producing amides of aromatic carboxylic acids, according to which at least one aromatic carboxylic acid of formula (I) Ar-COOH, wherein Ar is an optionally substituted aryl radical comprising between 5 and 50 atoms, is reacted with at least one amine of formula (II) HNR1R2, wherein R1 and R2 are independently hydrogen or a hydrocarbon radical comprising between 1 and 100 C atoms, to form an ammonium salt, and said ammonium salt is then reacted to form a carboxylic acid amide, under microwave irradiation in a reaction pipe, the longitudinal axis of the pipe being oriented in the direction of propagation of the microwaves of a monomode microwave applicator.

L'invention porte sur un procédé de préparation d'amides d'acides carboxyliques aromatiques, et notamment sur un procédé continu de préparation d'amides d'acides carboxyliques aromatiques, suivant lequel au moins un acide carboxylique aromatique de formule (I) Ar-COOH, dans laquelle Ar est un radical aryle éventuellement substitué et ayant de 5 à 50 atomes, est mis à réagir avec au moins une amine de formule (II) HNR1R2 dans laquelle R1 et R2 représentent chacun indépendamment de l'autre atome d'hydrogène ou un reste hydrocarboné ayant 1 à 100 atomes de carbone, pour donner un sel d'ammonium, ce dernier étant ensuite mis à réagir, sous un rayonnement micro-ondes dans un tube de réaction dont l'axe longitudinal se trouve dans la direction de propagation des micro-ondes d'un application de micro-ondes monomodales, pour donner l'amide d'acide carboxylique.

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