Sodium Hydroxide → HCID 59700608, compound

HRID 902022Notes

Reaction equation

HRID 902022 reaction equation
Br[C:2]1[C:3]([C:11]2[CH:16]=[CH:15][CH:14]=[C:13]([CH3:17])[N:12]=2)=[N:4][N:5]2[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=12.[F:18][C:19]1[CH:24]=[CH:23][C:22](B(O)O)=[CH:21][CH:20]=1.[OH-].[Na+]>COCCOC.CCOC(C)=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>[F:18][C:19]1[CH:24]=[CH:23][C:22]([C:2]2[C:3]([C:11]3[CH:16]=[CH:15][CH:14]=[C:13]([CH3:17])[N:12]=3)=[N:4][N:5]3[CH:10]=[CH:9][CH:8]=[CH:7][C:6]=23)=[CH:21][CH:20]=1

Participants

7

Reactant 3

HCID 14798Sodium HydroxideHCID 2856454-Fluorophenylboronic acidHCID 59700618HCID 59700618, compound

Product 1

HCID 59700608HCID 59700608, compoundYield 62%

Reagents, catalysts & solvents 3

HCID 178418397HCID 178418397, compoundCatalystHCID 80711,2-DimethoxyethaneSolventHCID 8857Ethyl AcetateSolvent

Procedure

A solution of 3-bromo-2-(6-methyl-pyridin-2-yl)-pyrazolo[1,5-a]pyridine (0.25 g, 0.9 mmol) and p-fluorophenyl-boronic acid (0.15 g, 1.04 mmol), in DME (10 mL) is purged with argon. The solution is treated with NaOH (0.07 g, 1.7 mmol) and (PPh3)4Pd (0.05 g, 0.04 mmol) then heated at reflux overnight. The reaction is then cooled, diluted in EtOAc, and washed with water and brine. The organic solution is dried over MgSO4 and the solvent removed in vacuo. The residue is purified by silica gel column chromatography using a mixture of hexanes/EtOAc to afford 0.164 g (62%) of desired product as a white solid. UV (95% EtOH) λmax 248 nm (ε 20386). TOF MS ES+ exact mass calculated for C19H14FN3 (p+1): m/z=304.1250. Found: 304.1249. Anal. Calcd for C19H14FN3: C, 75.23; H, 4.65; N, 13.85. Found: C, 75.10; H, 4.76; N, 13.70.

Workup

  1. temperaturethen heated
  2. temperatureat reflux overnight
  3. temperatureThe reaction is then cooled
  4. washwashed with water and brine
  5. dry with materialThe organic solution is dried over MgSO4
  6. customthe solvent removed in vacuo
  7. customThe residue is purified by silica gel column chromatography
  8. additiona mixture of hexanes/EtOAc

Sources & evidence

ORD record
ord-11040ec29c724c648beed0e196d48992
Source dataset
uspto-grants-2008_04
Patent number
US07365066B2

Reaction notes

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