Process for the production of substituted bromobenzenes

Details Process for the production of substituted bromobenzenes Process for the production of substituted bromobenzenes

A - Human Necessities

01

N

A01N 29/04 (2006.01) C07C 17/093 (2006.01)

Patent

CA 2667499

The present invention relates to a process for the production of compounds of formula (I) wherein X is fluoro, chloro, bromo or iodo and n is 1, 2, 3 or 4, which process comprises reacting a compound of formula (II) wherein the substituents are as defined for formula (I), with inorganic nitrite in an acidic aqueous medium in the presence of bromide and a copper catalyst and wherein the process is carried out as a one-pot reaction.

La présente invention porte sur un procédé de fabrication de composés représentés par la formule (I) dans laquelle X est fluoro, chloro, bromo ou iodo et n est 1, 2, 3 ou 4. Ce procédé comprend la réaction d'un composé représenté par la formule (II), dans laquelle les substituants sont tels que définis pour la formule (I), avec un nitrite inorganique dans un milieu aqueux acide en présence de bromure et d'un catalyseur au cuivre. Le procédé est réalisé en tant que réaction monotope.

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