The present invention is directed to a process for the manufacture of methyl limonitrile comprising a mixture of 3,7-dimethyl-2,6-nonadiene nitrile, 3,7-dimethyl-3,6-nonadiene nitrile and 7-methyl-3-methylene-6-nonene nitrile comprising the following steps: a) reacting 6-methyl-5-octen-2-one with cyano acetic acid and removing carbon dioxide and water, wherein the reaction and the removal of carbon dioxide and water are performed in the presence of a base and a co-base 1 in an organic solvent, and wherein the organic solvent is a solvent which forms a heteroazeotrop with water; b) removing the solvent and the base of the reaction mixture obtained after having performed step a) or step c) by distillation to obtain a reaction mixture, whereby this step may optionally be performed in the presence of a co-base 2; c) isomerizing the reaction mixture obtained after having performed step a) or step b) to obtain an isomerized reaction mixture in the presence of a co-base 2; whereby step b) can be performed before or after step c).
本发明涉及一种制备甲基
柠檬腈的方法,包括以下步骤:a)将
6-甲基-5-辛烯-2-酮与
氰乙酸反应,并在碱和共碱1的存在下去除
二氧化碳和
水,其中反应和去除
二氧化碳和
水在有机溶剂中进行,有机溶剂是与
水形成异质共沸物的溶剂;b)通过蒸馏去除在步骤a)或步骤c)完成后获得的反应混合物中的溶剂和碱,以获得反应混合物,该步骤可以在共碱2的存在下进行;c)在共碱2的存在下,对在步骤a)或步骤b)完成后获得的反应混合物进行异构化,以获得异构化的反应混合物;其中步骤b)可以在步骤c)之前或之后进行。