Hydrochloric Acid → 5-(2-fluoro-4-nitrophenoxy)-6-(pyridine-4-yl)-1H-indazole

HRID 1661981Notes

Reaction equation

[F:1][C:2]1[CH:29]=[C:28]([N+:30]([O-:32])=[O:31])[CH:27]=[CH:26][C:3]=1[O:4][C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][C:13]=1[C:14]1[CH:19]=[CH:18][N:17]=[CH:16][CH:15]=1)[N:10](C1CCCCO1)[N:9]=[CH:8]2.Cl.C([O-])(O)=O.[Na+].CCOC(C)=O>CCO>[F:1][C:2]1[CH:29]=[C:28]([N+:30]([O-:32])=[O:31])[CH:27]=[CH:26][C:3]=1[O:4][C:5]1[CH:6]=[C:7]2[C:11](=[CH:12][C:13]=1[C:14]1[CH:19]=[CH:18][N:17]=[CH:16][CH:15]=1)[NH:10][N:9]=[CH:8]2

Participants

Conditions

Temperature: 80 °C

Procedure

To a solution of 5-(2-fluoro-4-nitrophenoxy)-6-(pyridine-4-yl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (2.8 g, 6.45 mmol) in EtOH (30 mL) is added HCl (concentrated 5.0 mL). The mixture is stirred at 80° C. for 2 hours. Then aqueous NaHCO3 and EtOAc are added. The organic phase is dried over anhydrous MgSO4 and concentrated. The residue is purified by silica gel column chromatography eluting with PE:EtOAc (3:1) to give the desired product (1.95 g, 86.0% yield). MS (m/z): 351.0 (M+H).

Workup

dry with materialThe organic phase is dried over anhydrous MgSO4
concentrationconcentrated
customThe residue is purified by silica gel column chromatography
washeluting with PE

Sources & evidence

ORD record: ord-1b84e0ff10d0491e9b1bc614f25a69b1
Source dataset: uspto-grants-2011_10
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08030302B2

Reaction notes

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