Cyclopentanone → 2-(2-Fluoro-pyridin-4-yl)-2-cyclo-pentylamino-1-(3-trifluoromethyl-phenyl)-ethanol

HRID 1533109Notes

Reaction equation

HRID 1533109 reaction equation
[NH2:1][CH:2]([C:15]1[CH:20]=[CH:19][N:18]=[C:17]([F:21])[CH:16]=1)[CH:3]([C:5]1[CH:10]=[CH:9][CH:8]=[C:7]([C:11]([F:14])([F:13])[F:12])[CH:6]=1)[OH:4].[C:22]1(=O)[CH2:26][CH2:25][CH2:24][CH2:23]1.[BH-](OC(C)=O)(OC(C)=O)OC(C)=O.[Na+].C([O-])(O)=O.[Na+]>ClCCCl>[F:21][C:17]1[CH:16]=[C:15]([CH:2]([NH:1][CH:22]2[CH2:26][CH2:25][CH2:24][CH2:23]2)[CH:3]([C:5]2[CH:10]=[CH:9][CH:8]=[C:7]([C:11]([F:12])([F:13])[F:14])[CH:6]=2)[OH:4])[CH:20]=[CH:19][N:18]=1

Participants

6

Reactant 4

HCID 8452CyclopentanoneHCID 516892Sodium BicarbonateHCID 5049666Sodium triacetoxyborohydrideHCID 155242512-Amino-2-(2-fluoropyridine-4-yl)-1-(3-trifluoromethylphenyl)ethanol

Product 1

HCID 155242522-(2-Fluoro-pyridin-4-yl)-2-cyclo-pentylamino-1-(3-trifluoromethyl-phenyl)-ethanolYield 92%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Procedure

The 2-amino-2-(2 -fluoro-pyridin-4-yl)-1-(3-trifluoromethyl-phenyl)-ethanol (5) (1.0 g, 3.3 mmol), cyclopentanone (0.42 g, 5.0 mmol), and Na(OAc)3BH (1.4 g, 6.7 mmol) in 1,2 dichloroethane (20 mL) were stirred under argon at RT for 15 hrs. The resulting mixture was treated with sat. aqueous NaHCO3 (50 mL), extracted with ethyl acetate (3×75 mL), dried (sodium sulfate), and concentrated. The resulting residue was purified by silica gel chromatography using 50% ethyl acetate in methylene chloride to give the title product (1.1 g, 92%). 1H NMR (300 MHz, CDCl3) d 8.05 (d, J=4.9 Hz, 1 H, Pyr), 7.51 (d, J=7.9 Hz, 1 H, Ar), 7.36 (t, J=7.8 Hz, 1 H, Ar), 7.32 (s, 1 H, Ar), 7.22 (d, J=7.9 Hz, 1 H, Ar), 6.81 (d, J=4.9 Hz, 1 H, Pyr), 6.64 (s, 1 H, Pyr), 5.00 (d, J=4.6 Hz, 1 H, PhCHOH), 4.01 (d, J=4.9 Hz, 1 H, CHCHNH), 2.99 (quin, J=3.0 Hz, 1 H, CH2CHCH2), 1.85-1.25 (m, 8 H, CH2).

Workup

  1. extractionextracted with ethyl acetate (3×75 mL)
  2. dry with materialdried (sodium sulfate)
  3. concentrationconcentrated
  4. customThe resulting residue was purified by silica gel chromatography

Sources & evidence

ORD record
ord-1791b5f1f7af4d779d1bd547b315c1bd
Source dataset
uspto-grants-2001_03
Patent number
US06207687B1

Reaction notes

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