Sodium Acetate → (2R,5R)-5-(2-Fluorophenyl)-2,5-dimethyl-2-(trifluoromethyl)-5,6-dihydro-2H-1,4-oxazin-3-amine

HRID 2196288Notes

Reaction equation

HRID 2196288 reaction equation
Br[C:2]1[CH:3]=[CH:4][C:5]([F:21])=[C:6]([C@:8]2([CH3:20])[CH2:13][O:12][C@@:11]([CH3:18])([C:14]([F:17])([F:16])[F:15])[C:10]([NH2:19])=[N:9]2)[CH:7]=1.C([O-])(=O)C.[Na+]>CO.[Pd]>[F:21][C:5]1[CH:4]=[CH:3][CH:2]=[CH:7][C:6]=1[C@:8]1([CH3:20])[CH2:13][O:12][C@@:11]([CH3:18])([C:14]([F:15])([F:16])[F:17])[C:10]([NH2:19])=[N:9]1

Participants

5

Reactant 2

HCID 517045Sodium AcetateHCID 66666066rel-(2R,5R)-5-(5-Bromo-2-fluorophenyl)-2,5-dimethyl-2-(trifluoromethyl)-5,6-dihydro-2H-1,4-oxazin-3-amine

Product 1

HCID 66665656(2R,5R)-5-(2-Fluorophenyl)-2,5-dimethyl-2-(trifluoromethyl)-5,6-dihydro-2H-1,4-oxazin-3-amine

Reagents, catalysts & solvents 2

HCID 23938PalladiumCatalystHCID 887MethanolSolvent

Procedure

A solution of (2R,5R)-5-(5-bromo-2-fluoro-phenyl)-2,5-dimethyl-2-trifluoromethyl-5,6-dihydro-2H-[1,4]oxazin-3-ylamine (1.66 g, 4.5 mmol) and sodium acetate (0.369 g, 4.5 mmol) in MeOH (50 ml) was hydrogenated over 10% Pd—C for 6 h at 50° C. The catalyst was filtered off over Celite and the filtrate was concentrated. The residue was dissolved in saturated NaHCO3 solution and extracted with EtOAc. Combined extracts were washed with brine, dried over MgSO4, filtered and concentrated to provide the title compound as a colorless oil: TLC (hexane-EtOAc 1:1): Rf=0.19; UPLC RtH5=0.777 min; ESIMS: 291 [(M+H)+]; 1H NMR (360 MHz, CDCl3): δ 7.41 (dt, 1H), 7.26 (m, 1H), 7.11 (t, 1H), 7.05 (dd, 1H), 4.11 (dd, 1H), 3.94 (dd, 1H), 1.54 (s, 3H), 1.49 (s, 3H).

Workup

  1. filtrationThe catalyst was filtered off over Celite
  2. concentrationthe filtrate was concentrated
  3. dissolutionThe residue was dissolved in saturated NaHCO3 solution
  4. extractionextracted with EtOAc
  5. washCombined extracts were washed with brine
  6. dry with materialdried over MgSO4
  7. filtrationfiltered
  8. concentrationconcentrated

Sources & evidence

ORD record
ord-37f613f0ca4440e8a9760e0ef06a7aa6
Source dataset
uspto-grants-2012_12
Patent number
US08338413B1

Reaction notes

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