Process for the preparation of N-cyanimido esters

摘要

A process is described for the preparation of N-cyanimido esters by reacting, in a first step, nitriles, alcohols and hydrogen chloride to form the corresponding imido ester hydrochlorides, and, in a second step, subsequently reacting the imido ester hydrochlorides with cyanamide in the aqueous phase, the first step being carried out in the presence of acetoacetates and the second step in an aqueous solution whose pH has been brought to 5-8 by adding bases. The process according to the invention allows high yields and degrees of purity to be achieved in both steps, thus making it suitable even for an industrial scale.