异氰酸2-溴苯酯

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:0.00; pressure:0.00; stir:

反应条件: temp:50.01; pressure:0.00; stir:; See reaction.notes.procedure_details.

实验步骤: 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%. the mixture was refluxed for 24 hours After cooling the precipitated crystals were collected by filtration washed with ethyl acetate dried under reduced pressure were added Ice water was added to the reaction mixture the insolubles were filtered off The precipitated crystals were collected by filtration washed with water dried under reduced pressure