Dabco → 2-Phenoxybenzene-1-sulfonyl isocyanate

Participants

Reaction Steps

25.0 g of 2-phenoxyphenylsulfonamide, 14.0 g of n-hexyl isocyanate, a catalytic amount of 1,4-diazabicyclo[2,2,2]-octane and 150 ml xylene were refluxed with stirring for an hour. Thereafter, the mixture was reacted with a solution of 11.9 g of trichloromethyl chloroformate in 30 ml of xylene in a manner similar to that of Example (1). At the end of the reaction, the xylene and n-hexyl isocyanate were distilled off, to obtain 22.8 g of 2-phenoxyphenylsulfonylisocyanate. B.p. 146°-150° C./0.7 mmHg.

Provenance & Evidence