Sodium Bicarbonate → 3-Chloro-4-[2-(2-chloro-pyridin-4-yl)-3,3,3-trifluoro-2-hydroxy-1-methyl-propyl]-phenol

HRID 1097923Notes

Reaction equation

HRID 1097923 reaction equation
[Cl:1][C:2]1[CH:7]=[C:6]([O:8]C)[CH:5]=[CH:4][C:3]=1[CH:10]([CH3:24])[C:11]([C:17]1[CH:22]=[CH:21][N:20]=[C:19]([Cl:23])[CH:18]=1)([OH:16])[C:12]([F:15])([F:14])[F:13].C([O-])(O)=O.[Na+]>Br>[Cl:1][C:2]1[CH:7]=[C:6]([OH:8])[CH:5]=[CH:4][C:3]=1[CH:10]([CH3:24])[C:11]([C:17]1[CH:22]=[CH:21][N:20]=[C:19]([Cl:23])[CH:18]=1)([OH:16])[C:12]([F:15])([F:14])[F:13]

Participants

4

Reactant 2

HCID 516892Sodium BicarbonateHCID 574212633-(2-Chloro-4-methoxy-phenyl)-2-(2-chloro-pyridin-4-yl)-1,1,1-trifluoro-butan-2-ol

Product 1

HCID 574212643-Chloro-4-[2-(2-chloro-pyridin-4-yl)-3,3,3-trifluoro-2-hydroxy-1-methyl-propyl]-phenolYield 73.5%

Reagents, catalysts & solvents 1

HCID 260Hydrogen BromideSolvent

Conditions

Temperature
105 °C

Procedure

3-(2-Chloro-4-methoxy-phenyl)-2-(2-chloro-pyridin-4-yl)-1,1,1-trifluoro-butan-2-ol (Example 132, 48 mg) was dissolved in 48% aqueous HBr (0.9 m) and stirred at 105° C. (bath temperature) for 4 h. The reaction mixture was then poured on ice-water-brine and sat aq NaHCO3 and extracted with ethyl acetate. The combined organic phases were washed with brine, dried over MgSO4 and evaporated in vacuo. The resulting brown residue was purified by flash chromatography (8 g silica gel, ethyl acetate/heptane 1:4) to give the title compound as off-white semisolid (34 mg). MS (m/e)=364.0 (M−H).

Workup

  1. additionThe reaction mixture was then poured on ice-water-brine
  2. extractionextracted with ethyl acetate
  3. washThe combined organic phases were washed with brine
  4. dry with materialdried over MgSO4
  5. customevaporated in vacuo
  6. customThe resulting brown residue was purified by flash chromatography (8 g silica gel, ethyl acetate/heptane 1:4)

Sources & evidence

ORD record
ord-64b8912a3080458398bc0c9a1c994277
Source dataset
uspto-grants-2012_03
Patent number
US08143280B2

Reaction notes

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