There are prepared .alpha.-ketocarboxylic acid amides of the formula ##STR1## where R is hydrogen, R.sub.1 and R.sub.2 are the same or different, R.sub.1 is alkyl of 1 to 18 carbon atoms or haloalkyl, preferably chloroalkyl, of 1 to 18 carbon atoms, and R.sub.2 is hydrogen, alkyl of 1 to 18 carbon atoms or haloalkyl, preferably chloroalkyl, of 1 to 18 carbon atoms or ##STR2## together is a cycloalkyl group of 3 to 8 carbon atoms which can be substituted by one or more 1 to 5 carbon atom alkyl groups or by one or more halogen atoms, preferably chlorine atoms, with the proviso that when ##STR3## form a cycloalkyl group then R can also be alkyl of 1 to 5 carbon atoms. The process comprises saponifying an acyl cyanide of the formula ##STR4## in which R, R.sub.1 and R.sub.2 are as defined above in an organic solvent or mixture of such solvents which is liquid and inert under the reaction conditions, first with gaseous hydrogen chloride and then treating with water at a temperature of about -70.degree. C. to about +70.degree. C. and then isolating the .alpha.-ketocarboxylic acid amide in conventional manner. Several of the cyclic .alpha.-ketocarboxylic acid amides are new compounds.
本文介绍了一种公式为##STR1##的.α.-
酮羧酸酰胺,其中R为氢,R.sub.1和R.sub.2相同或不同,R.sub.1为1到18个碳原子的烷基或卤代烷基,优选为1到18个碳原子的
氯代烷基,R.sub.2为氢,1到18个碳原子的烷基或卤代烷基,优选为1到18个碳原子的
氯代烷基,或##STR2##在一起形成一个3到8个碳原子的环烷基,可以由一个或多个1到5个碳原子的烷基或一个或多个卤素原子,优选为
氯原子,取代,但当##STR3##形成一个环烷基时,R还可以是1到5个碳原子的烷基。该过程包括在有机溶剂或混合溶剂中皂化公式为##STR4##的酰基
氰化物,在反应条件下首先用气态
氯化氢处理,然后在温度为约-70°C到约+70°C的
水中处理,然后以常规方式分离α-
酮羧酸酰胺。其中有几种环状α-
酮羧酸酰胺是新化合物。