Phenyl isocyanate → Formanilide

Participants

Reaction Steps

A solution of phenyl isocyanate (1.2 g.; 0.01 mole in 100 ml. anhydrous 1,4-dioxane containing two drops of anhydrous triethylamine was mixed with 500 mg. of 10% Pd-on-carbon and shaken at a pressure of 50 p.s.i. of hydrogen on a Parr low pressure hydrogenator. The uptake of hydrogen was complete in 5 minutes. The catalyst was collected and washed with 50 ml. of 1,4-dioxane. The solvent was evaporated to give 1.2 g. (98% yield) of slightly yellow oil which slowly crystallized. The product was confirmed to be formanilide by ir, nmr and glc analyses.

Provenance & Evidence