Acetic Acid → HCID 9923765, compound

Participants

Reaction Steps

5-Aminoindane (266 mg) and 4-dimethylamino-4-phenylcyclohexanone (434 mg) were dissolved in dry 1,2-dichloroethane (10 ml) under argon. Glacial acetic acid (2 mmol) and sodium triacetoxyborohydride (600 mg) were added and the mixture was stirred for 24 hours at RT. For working up, the reaction mixture was concentrated and the residue was adjusted to pH 11 with five molar sodium hydroxide solution. The alkaline phase was diluted with water (10 ml) and extracted with ethyl acetate (4×20 ml). The combined extracts were dried over sodium sulfate and filtered and the filtrate was concentrated. The crude product obtained was chromatographed over silica gel with ethyl acetate/ethanol (1:1). 270 mg of the nonpolar diastereoisomer of N′-indan-5-yl-N,N-dimethyl-1-phenyl-cyclohexane-1,4-diamine were obtained as a white solid (m.p. 162-164° C.).

Provenance & Evidence