C - Chemistry – Metallurgy – 07 – C
Patent
C - Chemistry, Metallurgy
07
C
C07C 217/76 (2006.01) C07C 209/26 (2006.01) C07C 213/00 (2006.01) C07C 213/02 (2006.01) C07C 231/02 (2006.01) C07C 233/18 (2006.01)
Patent
CA 2112416
A process for the preparation of 2-alkyl-6-methyl-N-(1'methoxy-2'-propyl)- aniline by catalytic reductive alkylation wherein at least one mole equivalent of methoxyacetone is reacted with one mole equivalent of 2-alkyl-6-methyl-aniline in a liquid medium without an additional solvent, in the presence of a platinised carbon catalyst and hydrogen and in the presence of an acid cocatalyst under a hydrogen pressure of between 2 × 10 5 and 1 × 6 Pa at a temperature between 20 and 80 °C, characterised in that the reaction mixture contains water from the beginning of the reaction and after the hydrogenation, base is added, the reaction mixture is filtered to separate the catalyst and the title compound recovered from the filtrate. The process is particularly useful for the preparation of N-substituted chloracetanilide herbicides.
Bader Rolf
Flatt Peter
Radimerski Paul
Ag Ciba-Geigy
Fetherstonhaugh & Co.
Syngenta Participations Ag
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