[F:1][CH:2]([F:12])[O:3][C:4]1[CH:5]=[C:6]([CH:9]=[CH:10][CH:11]=1)[CH:7]=[O:8].[C-:13]#[N:14].[K+].OS([O-])=O.[Na+]>C(OCC)(=O)C.O>[F:1][CH:2]([F:12])[O:3][C:4]1[CH:5]=[C:6]([CH:7]([OH:8])[C:13]#[N:14])[CH:9]=[CH:10][CH:11]=1To 3-difluoromethoxybenzaldehyde (1.77 g, 10 mmol) in ethyl acetate (25 mL) was added a solution of KCN (2.0 g) and NaHSO3 (3.2 g) dissolved in H2O (25 mL). It was left stirring overnight before it was extracted with ethyl acetate (2×50 mL). The combined organic extracts were dried and concentrated. The crude product was purified by silica gel chromatography to give 131A (1.85 g, 92% yield) as an oil.
Wird geladen…