2-Isocyanatoalkyl esters of organic carboxylic acids are prepared by reacting (a) an aqueous solution of a 2-oxazoline with (b) an organic solution of phosgene dissolved in a water-immiscible organic solvent in the presence of (c) a hydrochloric acid acceptor. As an example, 2-isocyanatoethyl methacrylate was prepared by concurrently blending an aqueous stream of 2-isopropenyl-2-oxazoline, a methylene chloride stream of phosgene and an aqueous stream of sodium hydroxide at a temperature of from about 0.degree. C. to about 10.degree. C. The reaction rate is very high and the reaction is essentially complete upon blending the reactants.
有机
羧酸的2-异
氰酸烷基酯是通过将(a) 2-
噁唑烷的
水溶液与(b)
氯甲酰在不溶于
水的有机溶剂中溶解的有机溶液反应,并在(c) 氢
氯酸受体的存在下制备。例如,2-异
氰酸乙基
甲基丙烯酸酯是通过同时混合2-异
丙烯酰基-2-
噁唑烷的
水流,
氯甲酰的
甲烷氯流和
氢氧化钠的
水流,在从约0°C到约10°C的温度下制备的。反应速率非常高,并且混合反应物后反应基本上是完全的。