1-(2-Hydroxyethyl)piperazine → HCID 5330061, compound

Participants

Reaction Conditions

Reaction Steps

4-(2-Hydroxyethyl)piperazine (104 mg, 0.80 mmol) is added to a suspension of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-(4-formylphenyl)thieno[3,2-b]pyridine-6-carbonitrile (227 mg, 0.50 mmol) in 15 mL of dichloromethane and 1 mL of N,N-dimethylformamide. The reaction mixture is cooled to 0° C. and sodium triacetoxyborohydride (800 mg, 3.8 mmol) is added. After stirring at 0° C. for 1.5 hours, 2 drops of acetic acid are added and the reaction mixture is allowed to warm to room temperature and stirred overnight. The reaction is quenched by the addition of water and then partitioned between aqueous sodium bicarbonate and dichloromethane. The organic layer is dried over sodium sulfate, filtered and concentrated in vacuo. The residue is purified by flash column chromatography eluting with 10% methanol in dichloromethane to provide 100 mg of 7-[(2,4-dichloro-5-methoxyphenyl)amino]-2-(4-{[4-(2-hydroxyethyl)piperazin-1-yl]methyl}phenyl)thieno[3,2-b]pyridine-6-carbonitrile as white crystals, mp 189–190° C.; 1H NMR (DMSO-d6) δ 2.27–2.44 (m, 10H), 3.41–3.50 (m, 4H), 3.85 (s, 3H), 4.36 (s, 1H), 7.37 (s, 1H), 7.40 (d, J=8 Hz, 2H), 7.67 (d, J=8 Hz, 2H), 7.76 (s, 1H), 7.89 (s, 1H), 8.60 (s, 1H), 9.74 (s, 1H); MS 566.3 (M−H)−.

Provenance & Evidence