Potassium Carbonate → 1-(2'-t-Butoxycarbonyl-3-fluorobiphenyl-4-ylmethyl)-5-propyl-1H-pyrazole-3-carboxylic acid ethyl ester

HRID 1643997Notes

Reaction equation

[CH2:1]([C:4]1[CH:8]=[C:7]([C:9]([O:11][CH2:12][CH3:13])=[O:10])[NH:6][N:5]=1)[CH2:2][CH3:3].[C:14]([O:18][C:19]([C:21]1[C:22]([C:27]2[CH:32]=[CH:31][C:30]([CH2:33]Br)=[C:29]([F:35])[CH:28]=2)=[CH:23][CH:24]=[CH:25][CH:26]=1)=[O:20])([CH3:17])([CH3:16])[CH3:15].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C.CCOC(C)=O>[CH2:12]([O:11][C:9]([C:7]1[CH:8]=[C:4]([CH2:1][CH2:2][CH3:3])[N:5]([CH2:33][C:30]2[CH:31]=[CH:32][C:27]([C:22]3[CH:23]=[CH:24][CH:25]=[CH:26][C:21]=3[C:19]([O:18][C:14]([CH3:16])([CH3:15])[CH3:17])=[O:20])=[CH:28][C:29]=2[F:35])[N:6]=1)=[O:10])[CH3:13]

Participants

Conditions

Temperature: 65 °C

Procedure

Ethyl 3-n-propylpyrazole-5-carboxylate (1.05 g, 5.8 mmol), 4′-bromomethyl-3′-fluorobiphenyl-2-carboxylic acid t-butyl ester (2.0 g, 5.8 mmol), and potassium carbonate (1.6 g, 11.5 mmol) were dissolved in DMF (10 mL). The mixture was stirred at 65° C. for 16 hours, then diluted with EtOAc. The organic layer was washed with saturated NaHCO3 and saturated aqueous NaCl, and dried over Na2SO4. The solvent was removed in vacuo and the residue was purified by flash chromatography (EtOAc in hexanes) to yield 1-(2′-t-butoxycarbonyl-3-fluorobiphenyl-4-ylmethyl)-5-propyl-1H-pyrazole-3-carboxylic acid ethyl ester (2.7 g).

Workup

washThe organic layer was washed with saturated NaHCO3 and saturated aqueous NaCl
dry with materialdried over Na2SO4
customThe solvent was removed in vacuo
customthe residue was purified by flash chromatography (EtOAc in hexanes)

Sources & evidence

ORD record: ord-a24b132eb0e349ddb43b4c7e91fe8a66
Source dataset: uspto-grants-2012_02
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US08119634B2

Reaction notes

Loading…