Alkyl, aralkyl or aryl cyanoformate esters having from one to 20 carbon atoms are prepared by anhydrously reacting stoichiometric amounts of the corresponding alkyl, aralkyl or aryl haloformate and an organosilyl nitrile in the presence of a catalytic amount of a tertiary amine base, preferably 1,4-diazabicyclo\x9b2.2.2!octane, in the absence or presence of an inert solvent. The reaction is conducted at a temperature of from about -30.degree. C. to 70.degree. C., preferably at from about 5.degree. C. to 30.degree. C.
直链脂基、芳基脂基或芳基
氰酸酯酯,碳原子数为1至20,通过在无
水条件下反应相应的直链脂基、芳基脂基或芳基卤代酸酯和有机
硅基腈与催化量的三级胺碱(优选为1,4-二氮杂
双环[2.2.2]辛烷)在惰性溶剂的存在或缺席下进行制备。反应在约-30摄氏度至70摄氏度的温度下进行,优选在约5摄氏度至30摄氏度进行。