Synthesis method of chlorosulfonyl isocyanate

The invention specifically discloses a synthesis method of chlorosulfonyl isocyanate, and belongs to the technical field of organic chemical synthesis, and the synthesis method comprises the following steps: carrying out amination reaction on sulfonyl chloride and ammonia gas under the condition of an acid-binding agent to obtain amino sulfonyl chloride; and mixing the bis (trichloromethyl) carbonate with amino sulfonyl chloride obtained by the amination reaction, and then carrying out reflux reaction to obtain the chlorosulfonyl isocyanate. The raw materials of the synthesis method are sulfonyl chloride, ammonia gas and bis (trichloromethyl) carbonate, and high-toxicity raw materials such as Cl2, NaCN and SO3 are avoided, so that the toxicity and danger of the reaction raw materials, products and byproducts are reduced. In addition, the reaction yield and the product purity are improved by adopting the novel synthesis method. 本申请具体公开一种氯磺酰异氰酸酯的合成方法，属于有机化学合成技术领域，合成方法如下：磺酰氯与氨气在缚酸剂条件下进行胺化反应得到氨基磺酰氯，将双(三氯甲基)碳酸酯与胺化