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 x 10⁵ and 1 x 10⁶ 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.
                            一种通过催化还原烷基化反应制备 2-烷基-6-甲基-N-(1'甲氧基-2'-丙基)-
苯胺的工艺,其中至少一摩尔当量的甲氧基
丙酮与一摩尔当量的 2-烷基-6-甲基-
苯胺在液体介质中进行反应,无需额外溶剂、在
氢气压力为 2 x 10⁵ 和 1 x 10⁶ Pa 之间、温度为 20 至 80 °C 之间的条件下,在
铂化碳催化剂和
氢气的存在下,以及在酸性助催化剂的存在下进行反应,其特征在于反应混合物从反应开始时就含有
水,氢化后加入碱,过滤反应混合物以分离催化剂,并从滤液中回收标题化合物。
该工艺特别适用于制备 N-取代
氯乙酰苯胺
除草剂。