反应详情

3-Hydroxy-2-(hydroxymethyl)pyridine hydrochloride (1.57 g, 0.009 mol), potassium carbonate (8.09 g, 0.058 mol) and cyclobutyl bromide (5.0 g, 0.037 mol) were stirred together under nitrogen in N,N-dimethylformamide (20 ml) at 50° C. overnight. Water (40 ml) was added, and the resultant solution was acidified to pH 1 with hydrochloric acid (5 N). The solution was washed with dichloromethane (3×100 ml), basified to pH 14 with sodium hydroxide solution (4 N), and extracted with dichloromethane (3×100 ml). The organic layers from the extraction were combined, washed with water (1×100 ml), dried over magnesium sulfate and concentrated in uacuo to give a dark brown solid which was recrystallised from hexane to give the title compound (0.44 g). 1H NMR (250 MHz, CDCl3) δ 1.61-1.81 (1H, m), 1.86-1.91 (1H, m), 2.09-2.22 (2H, m), 2.39-2.51 (2H, m), 4.31 (1H, br s), 4.66 (1H, m), 4.74 (1H, s), 6.97 (1H, m), 7.07-7.17 (1H, m), 8.13 (1H, m); MS (ES+) m/e 180 [MH]+.

1. washThe solution was washed with dichloromethane (3×100 ml)
2. extractionextracted with dichloromethane (3×100 ml)
3. extractionThe organic layers from the extraction
4. washwashed with water (1×100 ml)
5. dry with materialdried over magnesium sulfate
6. concentrationconcentrated in uacuo
7. customto give a dark brown solid which
8. customwas recrystallised from hexane