A process for making 2-benzimidazolecarbamic acid, alkyl esters by reacting cyanamide or a cyanamide salt with an alkyl chloroformate in a weakly acidic to basic medium at a temperature between 0.degree. and 105.degree. C. to form an alkyl cyanocarbamate salt; then reacting the alkyl cyanocarbamate salt with an o-phenylenediamine in an acidic medium at a temperature between 40.degree. and 130.degree. C. to form the desired product and recovering it from the reaction mixture. The 2-benzimidazolecarbamic acid, alkyl esters are useful as fungicides and also useful as intermediates in the preparation of dialkyl esters of 2-carboxyaminobenzimidazole-1-carboxylic acids.
通过在弱酸性至碱性介质中,在0度至105度C的温度下,通过将
氰胺或
氰胺盐与烷基
氯甲酸酯反应,制备2-
苯并咪唑甲酸烷基酯的方法;然后,在40度至130度C的温度下,通过将烷基
氰基
甲酸盐与
邻苯二胺在酸性介质中反应,形成所需的产物,并从反应混合物中回收它。2-
苯并咪唑甲酸烷基酯可用作杀菌剂,并且还可用作制备2-羧基
氨基
苯并咪唑-1-
羧酸二烷基酯的中间体。