2-Propenoic acid, 2-cyano-3-ethoxy-, ethyl ester → N1-(2-Ethoxycarbonyl-2-cyanovinyl)-N1-methyl-N2-(2,4-dimethylphenyl)-formamidine

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Reaction Steps

48.6 g of N1 -methyl-N2 -(2,4-dimethylphenyl)-formamidine are dissolved in 100 cc of ether and a solution of 51 g of ethoxymethylene-cyanoacetic acid ethyl ester in 100 cc of ether is added at about 20° C. while stirring. The precipitated product is filtered off with suction after 5 hours. It is very pure. If desired it can be recrystallized from chloroform/petroleum ether (40°-80° C.). Yield 68 g, b.p. 140°-142° C. ##STR5##

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