Process for the preparation of substituted aromatic amino...

Details Process for the preparation of substituted aromatic amino... Process for the preparation of substituted aromatic amino...

C - Chemistry, Metallurgy

07

C

C07C 209/36 (2006.01) C07C 221/00 (2006.01) C07C 227/04 (2006.01) C07C 211/45 (2006.01) C07C 225/22 (2006.01) C07C 229/44 (2006.01) C07C 229/60 (2006.01)

Patent

CA 2265527

The present invention relates to a hydrogenation process for the preparation of aromatic amino compounds containing directly on the aryl ring or in a side chain one or more entities that may also undergo hydrogenation, such as carbon multiple bonds, nitrile groups, imino groups or carbonyl groups. The preparation is carried out by catalytic hydrogenation of the corresponding aromatic nitro compounds in the presence of a phosphorus-modified noble metal catalyst. The invention relates also to the use of modified noble metal catalysts for the hydrogenation of aromatic nitro compounds containing carbon multiple bonds and/or substituted by nitrite, imino or carbonyl groups.

La présente invention concerne un procédé d'hydrogénation pour la préparation de composés aminés aromatiques contenant directement sur la chaîne aryle ou dans une chaîne latérale une ou plusieurs entités qui peuvent également subir une hydrogénation, comme de multiples liaisons de carbone, des groupes nitrile, des groupes imino ou des groupes carbonyle. La préparation est effectuée par une hydrogénation catalytique des composés nitro aromatiques correspondants en présence d'un catalyseur de métal noble modifié par du phosphore. L'invention traite aussi de l'utilisation des catalyseurs de métal noble pour l'hydrogénation de composés nitro aromatiques contenant de multiples liaisons de carbone et/ou substitués par des groupes nitrile, imino ou carbonyle.

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