P - Chlorophenyl isocyanate should study the synthesis methods of phosgene route

P - Chlorophenyl isocyanate is an important organic synthetic intermediate, it is widely used in chemical, pharmaceutical and other industries. In terms of drug synthesis, the products are mainly used for synthetic drugs fall blood sugar. Currently, P - Chlorophenyl isocyanate synthesis method is given priority to with phosgene and react to chloroaniline, the method of preparation of P - Chlorophenyl isocyanate yield is high, but as a result of phosgene as highly toxic gas, large damage to the environment, and the measurement and operation is not very convenient, so it is necessary to explore the synthesis methods of phosgene route. 

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