申请人:Ciba-Geigy Corporation
公开号:US04267356A1
公开(公告)日:1981-05-12
A process is described for the preparation of N-(1'-alkoxycarbonylethyl)-2,6-dialkylanilines of the formula ##STR1## in which R.sub.1 and R.sub.2 are each methyl or ethyl and R.sub.3 is an alkyl group having 1 to 4 carbon atoms, this process being based on the reaction of a corresponding 2,6-dialkylaniline with a corresponding alkyl 2-chloropropionate or alkyl 2-bromopropionate. The process is carried out by carrying out the reaction of the 2,6-dialkylaniline with the 2-halogenopropionic acid ester at 110.degree.-130.degree. C. in the presence of an alkali metal iodide as the catalyst, and of an alkali metal carbonate or alkali metal bicarbonate as an acid acceptor, in excess 2,6-dialkylaniline as the solvent, removing, by distillation, the water formed during the reaction and working up the organic phase, which is obtained after adding water and separating the phases, by distillation. The N-(1'-alkoxycarbonylethyl)-2,6-dialkylanilines of the above formula which can be prepared by this process are valuable intermediates for the preparation of compounds having a pesticidal action.
描述了一种制备公式##STR1##的N-(1'-甲氧基碳酰乙基)-2,6-二烷基苯胺的方法,其中R.sub.1和R.sub.2各自是甲基或乙基,R.sub.3是一个具有1到4个碳原子的烷基,该工艺基于相应的2,6-二烷基苯胺与相应的烷基2-氯丙酸酯或烷基2-溴丙酸酯的反应。该工艺通过在110.degree.-130.degree. C.下,在碱性金属碘化物作为催化剂和碱性金属碳酸盐或碱性金属碳酸氢盐作为酸受体的情况下,将2,6-二烷基苯胺与2-卤代丙酸酯反应,并使用过量的2,6-二烷基苯胺作为溶剂,通过蒸馏去除反应中形成的水,并通过蒸馏处理有机相,该有机相是在加水并分离相之后获得的。可以通过此过程制备的上述公式的N-(1'-甲氧基碳酰乙基)-2,6-二烷基苯胺是有价值的中间体,用于制备具有杀虫活性的化合物。