A process for the preparation of pure 2-ethylamino-4-nitro-1-alkoxybenzenes of the formula (1) ##STR1## in which R denotes an alkyl(C.sub.1 -C.sub.4) or alkoxy(C.sub.1 -C.sub.4)-alkyl(C.sub.1 -C.sub.4) group, which comprises N-monoalkylation of 2-amino-4-nitro-1-alkoxybenzenes of the formula (2) ##STR2## in which R has the abovementioned meaning, using a slight excess of diethyl sulfate in non-polar, organic solvents in the absence of water at temperatures of about 40.degree. to about 120.degree. C.
一种制备纯2-乙基
氨基-4-硝基-1-烷氧基苯的方法,其
化学式为(1) ##STR1## 其中R表示烷基(C.sub.1-C.sub.4)或烷氧基(C.sub.1-C.sub.4)-烷基(C.sub.1-C.sub.4)基团,包括在无
水条件下,在非极性有机溶剂中使用略微过量的
硫酸二乙酯对
化学式为(2) ##STR2## 其中R具有上述含义的2-
氨基-4-硝基-1-烷氧基苯进行N-单烷基化反应,反应温度在40℃至120℃左右。