tert-Butyl 4-(4-(4-(benzyloxy)-4'-(trifluoromethyl)biphenyl-3-yl)pyridin-2-yl)piperazine-1-carboxylate → Tert-butyl 4-(4-(4-hydroxy-4'-(trifluoromethyl)biphenyl-3-yl)pyridin-2-yl)piperazine-1-carboxylate

HRID 1619715Notes

Reaction equation

HRID 1619715 reaction equation
C([O:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH:20]=[CH:19][C:18]([C:21]([F:24])([F:23])[F:22])=[CH:17][CH:16]=2)=[CH:11][C:10]=1[C:25]1[CH:30]=[CH:29][N:28]=[C:27]([N:31]2[CH2:36][CH2:35][N:34]([C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])[CH2:33][CH2:32]2)[CH:26]=1)C1C=CC=CC=1>C(O)C.[OH-].[OH-].[Pd+2]>[OH:8][C:9]1[CH:14]=[CH:13][C:12]([C:15]2[CH:16]=[CH:17][C:18]([C:21]([F:23])([F:24])[F:22])=[CH:19][CH:20]=2)=[CH:11][C:10]=1[C:25]1[CH:30]=[CH:29][N:28]=[C:27]([N:31]2[CH2:36][CH2:35][N:34]([C:37]([O:39][C:40]([CH3:43])([CH3:42])[CH3:41])=[O:38])[CH2:33][CH2:32]2)[CH:26]=1

Participants

4

Reactant 1

HCID 58042339tert-Butyl 4-(4-(4-(benzyloxy)-4'-(trifluoromethyl)biphenyl-3-yl)pyridin-2-yl)piperazine-1-carboxylate

Product 1

HCID 136200880Tert-butyl 4-(4-(4-hydroxy-4'-(trifluoromethyl)biphenyl-3-yl)pyridin-2-yl)piperazine-1-carboxylateYield 59.1%

Reagents, catalysts & solvents 2

HCID 9942167Palladium hydroxideCatalystHCID 702EthanolSolvent

Conditions

Temperature
60 °C

Procedure

tert-Butyl 4-(4-(4-(benzyloxy)-4′-(trifluoromethyl)biphenyl-3-yl)pyridin-2-yl)piperazine-1-carboxylate (Preparation 115, 1.30 g, 2.20 mmol) was dissolved in ethanol (20 mL) at room temperature and palladium hydroxide on activated charcoal (130 mg) was added. The reaction mixture was heated at 60° C. under a hydrogen atmosphere (50 psi) for 18 hours. The mixture was then filtered through a pad of Celite™, rinsed with ethanol and concentrated in vacuo. The residue was purified on silica gel by Biotage (5% to 60% ethyl acetate in heptane over 20 CV). Further purification by reverse phase using acetonitrile/water (5/95-95/5) with 0.1% formic acid as eluent gave the title compound (650 mg, 59%) as a white powder.

Workup

  1. filtrationThe mixture was then filtered through a pad of Celite™
  2. washrinsed with ethanol
  3. concentrationconcentrated in vacuo
  4. customThe residue was purified on silica gel by Biotage (5% to 60% ethyl acetate in heptane over 20 CV)
  5. customFurther purification by reverse phase

Sources & evidence

ORD record
ord-096e3baa91c04940aa412b57f7ffdb93
Source dataset
uspto-grants-2014_07
Patent number
US08772293B2

Reaction notes

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