反应详情

45 5 g of δ-chlorobutyl carbamate were initially introduced as a melt and 63 g of phosgene were passed into the melt at 80° C. within 6 hours. 150 g of chlorobenzene and 0.36 g (=0.4 mol %) of methylstearylformamide were then added and a further 159 g of phosgene were passed into the mixture at 130° C. over a further 16 hours. Excess phosgene was subsequently driven out using nitrogen. 23.7 g of δ-chlorobutyloxycarbonyl isocyanate having a boiling point of 86° to 109° C. at 20 mbar were obtained on subsequent distillation, corresponding to a yield of 44% of theory.