反应详情

12.5 g of N-[2-(2-chloroethoxy)-phenylsulfonyl]-N'-methylurea are suspended in 210 ml of chlorobenzene. This suspension is dried by azeotropic destilling off 20 ml of the solvent. 7.0 g of phosgene are introduced into the reaction mixture within 45 minutes at a temperature of 120°-130° C. Evaporation to dryness of the resulting clear solution yields 11.0 g of 2-(2-chloroethoxy)-phenylsulfonyl isocyanate in form of a yellowish oil.

1. dry with materialThis suspension is dried by azeotropic destilling off 20 ml of the solvent
2. addition7.0 g of phosgene are introduced into the reaction mixture within 45 minutes at a temperature of 120°-130° C
3. customEvaporation to dryness of the resulting clear solution