Acetic Acid → HCID 67361214, compound

Participants

Reaction Steps

Place 500 mg of 5-(1H-benzimidazol-2-yl)-2-bromo -9H-fluoren-9-one oxime (Z,E) in suspension in a mixture of 3.5 ml of water, 7 ml of ethanol and 3.5 ml of acetic acid. Add 335 mg of powdered zinc and stir at room temperature for 19 hours. The insoluble residues are filtered over sintered glass and rinsed with ethanol. Evaporation of the solvent under reduced pressure is a colourless foam which is taken up in suspension in 100 ml of water. The pH of the supernatant is then brought to 9 by the addition of a 1N aqueous solution of sodium hydroxide, and the persisting precipitate is filtered off, and washed with 3 times 50 ml of water and twice 100 ml of isopropyl ether. After drying at 50° C. in an oven under vacuum, in this way we obtain 1.08 g of 5-(1H-benzimidazol-2-yl)-2-bromo-9H-fluorene-9(R,S)-amine, in the form of a white powder which is used as it is in the following stage.

Provenance & Evidence