HCID 13729462, compound → HCID 20268361, compound

Participants

Reaction Steps

74.6 g of N-(2-pentafluoroethoxyphenylsulfonyl)-N'-methylurea are suspended in 1300 ml of chlorobenzene and made absolute by distilling off about 100 ml of solvent as an azeotrope. Then 48 g of phosgene are introduced at 120°-130° C. over 3 hours. The chlorobenzene is then completely distilled off, affording 65 g of 2-pentafluoroethoxyphenylsulfonyl isocyanate in the form of an almost colourless oil.

Provenance & Evidence