Acetone → HCID 66767284, Verbindung

Reaktionsgleichung

[F:1][C:2]1[CH:28]=[C:27]([N+:29]([O-:31])=[O:30])[CH:26]=[CH:25][C:3]=1[O:4][C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][C:13]=1[C:14]([O:16][CH2:17][CH3:18])=[O:15])[N:10](C1CCCCO1)[N:9]=[CH:8]2.FC(F)(F)C(O)=O.CC(C)=O>C(Cl)Cl>[F:1][C:2]1[CH:28]=[C:27]([N+:29]([O-:31])=[O:30])[CH:26]=[CH:25][C:3]=1[O:4][C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][C:13]=1[C:14]([O:16][CH2:17][CH3:18])=[O:15])[NH:10][N:9]=[CH:8]2

Komponenten

Versuchsvorschrift

To a solution of ethyl 5-(2-fluoro-4-nitrophenoxy)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole-6-carboxylate (15 g, 35 mmol) in DCM (300 mL) is added trifluoroacetic acid (TFA) (30 mL), and stirred at RT overnight. DCM is evaporated. The residue is partitioned between EtOAc (800 mL) and 5% aqueous NaHCO3 (400 mL). The organic layer is washed with saturated aqueous sodium chloride, dried over MgSO4, and concentrated. The residue is purified by silica gel column chromatography eluting with PE:acetone (5:1) to afford the product (10.4 g, 86% yield). MS (m/z): 346.1 (M+H).