Ammonium Chloride → 5-(2-Fluoro-4-nitrophenoxy)-6-(pyridine-4-yl)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole

HRID 2195494Notes

Reaction equation

Br[C:2]1[CH:10]=[C:9]2[C:5]([CH:6]=[N:7][N:8]2[CH:11]2[CH2:16][CH2:15][CH2:14][CH2:13][O:12]2)=[CH:4][C:3]=1[O:17][C:18]1[CH:23]=[CH:22][C:21]([N+:24]([O-:26])=[O:25])=[CH:20][C:19]=1[F:27].[N:28]1[CH:33]=[CH:32][C:31](B(O)O)=[CH:30][CH:29]=1.[F-].[Cs+].[NH4+].[Cl-]>O1CCOCC1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].CCOC(C)=O>[F:27][C:19]1[CH:20]=[C:21]([N+:24]([O-:26])=[O:25])[CH:22]=[CH:23][C:18]=1[O:17][C:3]1[CH:4]=[C:5]2[C:9](=[CH:10][C:2]=1[C:31]1[CH:32]=[CH:33][N:28]=[CH:29][CH:30]=1)[N:8]([CH:11]1[CH2:16][CH2:15][CH2:14][CH2:13][O:12]1)[N:7]=[CH:6]2

Participants

Conditions

Temperature: 110 °C

Procedure

A mixture of 6-bromo-5-(2-fluoro-4-nitrophenoxy)-1-(tetrahydro-2H-pyran-2-yl)-1H-indazole (5.0 g, 11.5 mmol), 4-pyridineboronic acid (3.0 g, 24.3 mmol), PdCl2(dppf) (1.8 g, 2.25 mmol) and CsF (5.0 g, 33.0 mmol) in 1,4-dioxane (100 mL) is stirred at 110° C. overnight. Then, aqueous NH4Cl and EtOAc are added. The organic phase is separated, 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 (2.8 g, 56% yield). MS (m/z): 435.1 (M+H).

Workup

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

Sources & evidence

ORD record: ord-e669adf6851e44f594e6da10f71fcf4d
Source dataset: uspto-grants-2012_12
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: USRE043878E1

Reaction notes

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