Polyhalogenated phenyl isocyanate synthesis with excess phosgene

Details Polyhalogenated phenyl isocyanate synthesis with excess phosgene Polyhalogenated phenyl isocyanate synthesis with excess phosgene

1982-10-25

1984-10-16

Torrence, Dolph H.

Chemistry of carbon compounds

Miscellaneous organic carbon compounds

C-metal

260453AR, C07C11802

Patent

active

044773897

ABSTRACT:
Two procedures are described that can be used to prepare polyhalogenated phenyl isocyanates (2,4,6-trichloro,2,3,5,6-tetrachloro, pentachloro, 2,4,6-tribromo and 2,4,6-trifluoro derivatives) from the corresponding anilines in good yields (95-99%) with small amounts of urea byproducts (1-5%) within reasonable reaction times (3-6 hours). These are:

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