反应详情

To a stirred solution of tert-butyl 2′-formyl-7′H-spiro[azetidine-3,5′-furo[3,4-b]pyridine]-1-carboxylate (0.5 g, 1.7 mmol, 1 eq.) in mixture of methanol (12 mL):water (12 mL) was added NaOAc (0.28 g, 3.45 mmol, 2 eq.) followed by addition of NH2OH.HCl (0.24 g, 3.45 mmol, 2 eq.) at room temperature. Resulting reaction mixture was stirred at room temperature for 18 hours under nitrogen atmosphere. After complete consumption starting material, reaction mixture was concentrated under reduced pressure; resulting residue was diluted with water (50 mL) and extracted by ethyl acetate (3×100 mL). Combined organic layer was dried over sodium sulphate and concentrated under reduced pressure to afford title compound as brown solid (0.520 g, 99%). 1H NMR (400 MHz, CDCl3) δ: 1.47 (s, 9H), 4.12 (d, J=9.88 Hz, 2H), 4.34 (d, J=10.12 Hz, 2H), 5.08 (s, 2H), 7.73 (d, J=7.92 Hz, 1H), 7.79 (d, J=7.96 Hz, 1H), 8.21 (s, 1H). LC-MS (m/z): 306.3 (M+H).

1. customResulting
2. customreaction mixture
3. customAfter complete consumption
4. custommaterial, reaction mixture
5. concentrationwas concentrated under reduced pressure
6. additionresulting residue was diluted with water (50 mL)
7. extractionextracted by ethyl acetate (3×100 mL)
8. dry with materialCombined organic layer was dried over sodium sulphate
9. concentrationconcentrated under reduced pressure