Triethylamine → HCID 9829859, compound

Participants

Reaction Steps

A 4N hydrochloric acid solution in ethyl acetate (30 ml) and ethanol (6 ml) were added to 1-[1-(tert-butoxycarbonyl)-4-ethoxycarbonylamino-4-piperidyl]-4-(6-chloronaphthalene-2-sulfonyl)-2-piperazinone (5.21 g), and the mixture was stirred at room temperature for 1 hour. The reaction mixture was concentrated, the precipitated crystals were filtered off, washed with ethyl acetate-ethanol, and dried to obtain 1-[4-ethoxycarbonylamino-4-piperidylmethyl]-4-(6-chloronaphthalene-2-sulfonyl)-2-piperazinone hydrochloride (3.71 g). A solution of 1-[4-ethoxycarbonylamino-4-piperidylmethyl]-4-(6-chloronaphthalene-2-sulfonyl)-2-piperazinone hydrochloride (3.40 g), 4-chloropyridine hydrochloride (1.12 g) and triethylamine (3.48 ml) in ethanol (100 ml) was reacted at 150° C. for 9 hours in a sealed tube. The reaction mixture was concentrated under reduced pressure, ethyl acetate was added thereto, and the mixture was washed with a 5% aqueous sodium carbonate solution and water, and concentrated. The resulting residue was purified by silica gel column chromatography (ethyl acetate:10% aqueous ammonia-containing methanol=95:5→80:20), and the precipitated crystals were washed with ethanol-ether to obtain the colorless crystalline title compound (1.52 g).

Provenance & Evidence