Potassium Carbonate → 3-(4-Amino-2-fluorophenyl)-5-(1-methyl-1H-pyrazol-4-yl)pyridin-2-amine

HRID 1428113Notes

Reaction equation

[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]([NH2:15])=[N:10][CH:11]=[C:12](Br)[CH:13]=2)=[C:4]([F:16])[CH:3]=1.[CH3:17][N:18]1[CH:22]=[C:21](B2OC(C)(C)C(C)(C)O2)[CH:20]=[N:19]1.C(=O)([O-])[O-].[K+].[K+].C(=O)(O)[O-].[Na+]>O1CCOCC1.O.C1C=CC([P]([Pd]([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)([P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)[P](C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)(C2C=CC=CC=2)C2C=CC=CC=2)=CC=1>[NH2:1][C:2]1[CH:7]=[CH:6][C:5]([C:8]2[C:9]([NH2:15])=[N:10][CH:11]=[C:12]([C:21]3[CH:20]=[N:19][N:18]([CH3:17])[CH:22]=3)[CH:13]=2)=[C:4]([F:16])[CH:3]=1

Participants

Conditions

Temperature: 100 °C

Procedure

The compound obtained in Step 1 of Example 29 (2 g), 1-methyl-4-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-1H-pyrazole (1.62 g), tetrakis(triphenylphosphine)palladium (0.41 g) and potassium carbonate (2.94 g) were suspended in dioxane (10 ml) and water (1 ml), and the suspension was heated under reflux at 100° C. for 61 hours. After leaving to cool, a saturated aqueous sodium bicarbonate solution was added, and the organic layer was extracted with ethyl acetate and dried over sodium sulfate. The solvent was distilled off under reduced pressure, and the residue was purified by silica gel column chromatography [ethyl acetate:methanol=10:1 (v/v)] to give 1.88 g of the title compound as a solid.

Workup

customAfter leaving
temperatureto cool
extractionthe organic layer was extracted with ethyl acetate
dry with materialdried over sodium sulfate
distillationThe solvent was distilled off under reduced pressure
customthe residue was purified by silica gel column chromatography [ethyl acetate:methanol=10:1 (v/v)]

Sources & evidence

ORD record: ord-6a3901e1b5454e9eaf582417589f766f
Source dataset: uspto-grants-2015_01
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08933103B2

Reaction notes

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