2-Bromophenyl isocyanate → HCID 18536716, compound

Participants

Reaction Conditions

Reaction Steps

To a suspension of the compound of Example 17 (100 mg, 262 μmol) in ethyl acetate (3 ml) was added 2-bromophenyl isocyanate (104 mg, 524 μmol), and the mixture was refluxed for 24 hours. After cooling, the precipitated crystals were collected by filtration, washed with ethyl acetate, and then dried under reduced pressure. These were suspended into ethanol (3 ml), 1 mol/L aqueous solution of lithium hydroxide (903 μl) and successively water (3 ml) were added, and the mixture was stirred for 75 minutes at 50° C. Ice water was added to the reaction mixture, the insolubles were filtered off. then the pH value was brought to 4 with 3 mol/L hydrochloric acid. The precipitated crystals were collected by filtration, washed with water, and then dried under reduced pressure, thereby obtaining 55.0 mg of title compound as colorless powder. Yield 34%.

Provenance & Evidence