Tetrafluoroboric acid → HCID 15869798, compound

Participants

Reaction Conditions

Reaction Steps

1.12 g (5.0 mmol) of 6-amino-1-(3-chloropropionyl)indoline (prepared as described in Preparation 6) were suspended in 10 ml of fluoboric acid (as a 42% w/v aqueous solution), and a solution of 380 mg (5.5 mmol) of sodium nitrite in 5 ml of water was added to the suspension while ice-cooling so that the internal temperature was maintained at 10° C. or lower. The mixture was then stirred while ice-cooling for 1 hour. The precipitated salt was collected by filtration and dried in a desiccator under reduced pressure by means of a vacuum pump to obtain 1.20 g (3.7 mmol) of the title compound as a solid (yield: 74%).

Provenance & Evidence