Trichloroacetyl isocyanate → 7,8-dihydro-6,6-dimethyl-7-hydroxy-8-trichloroacetylureido-6H-pyrano[2,3-f]benzo-2,1,3-oxadiazole

Participants

Reaction Steps

200 mg (0.850 mmol) of 7,8-dihydro-6,6-dimethyl-7-hydroxy-8-amino-6H-pyrano[2,3-f]benzo-2,1,3-oxadiazole and 20 ml of dichloromethane were stirred at room temperature, and 100 μl (0.935 mmol) of trichloroacetyl isocyanate were added thereto and stirred for 5 hours. The crystals precipitated were filtered off to obtain 90 mg of the intended compoundas colorless crystals. (yield: 25%)

Provenance & Evidence