反应详情

D1 (2.2 g) and n-propylamine hydrochloride (2.34 g) were combined in pyridine (75 ml) and the mixture refluxed for 8 h. Solvent was removed at reduced pressure, the residue dissolved in 2N sodium hydroxide and extracted with diethyl ether (×3) and DCM (×2). The combined organic phase was dried (Na2SO4) and solvent removed at reduced pressure. The residue was triturated with pentane to give the title compound (1.32 g) as a pale orange solid. 1H NMR (CDCl3) δ: 2.60 (3H, s), 5.44 (2H, bs), 6.66 (1H, s), 7.54 (1H, dd), 8.17 (1H, dd), 8.67 (1H, m).

1. temperaturethe mixture refluxed for 8 h
2. customSolvent was removed at reduced pressure
3. dissolutionthe residue dissolved in 2N sodium hydroxide
4. extractionextracted with diethyl ether (×3) and DCM (×2)
5. dry with materialThe combined organic phase was dried (Na2SO4) and solvent
6. customremoved at reduced pressure
7. customThe residue was triturated with pentane