Sodium Hydroxide → HCID 18918218, compound

Participants

Reaction Steps

To a solution of the product of step (vi) (815 mg) in dry dichloromethane (10 ml) under argon was added a 1M solution of boron tribromide in dichloromethane (10 ml). The reaction was stirred at room temperature for 14 days, extra aliquots of BBr3 solution being added after 3 and 7 days. After 2 weeks, excess 1M aqueous sodium hydroxide solution was added, dropwise at first, and the mixture stirred at room temperature for 3 hours. The precipitated material was filtered off and the aqueous layer of the filtrate separated. The pH of the aqueous layer was adjusted to 8 by addition of 2N HCl (aq.) and 1M NaHCO3 (aq.) before being extracted with ethyl acetate. The organic extracts were washed with brine, dried (MgSO4) and evaporated to dryness to yield 1-benzyl-3-(4-(4-pyridyl)piperazin-1-yl)-4-quinolon-7-ol (75 mg) as an off-white solid: m.p. 141°-6° C. NMR (d6DMSO) δ3.10 (4H, m), 3.50 (4H, m), 5.40 (2H, s), 6.67 (1H, d), 6.72 (1H, dd), 6.90 (2H, m), 7.30 (5H, m), 7.76 (1H, s), 8.07 (1H, d), 8.15 (2H, s), 10.15 (1H, br, s); m/Z 413 (M+H)+.

Provenance & Evidence