1,8-Diazabicyclo(5.4.0)undec-7-ene → (4S,6S)-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine

HRID 930316Notes

Reaction equation

HRID 930316 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:29])=[C:6]([C@:8]2([CH2:27][F:28])[CH2:13][C@@H:12]([C:14]([F:17])([F:16])[F:15])[O:11][C:10]([NH:18]C(=O)C3C=CC=CC=3)=[N:9]2)[CH:7]=1.N12CCCN=C1CCCCC2>CO>[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:29])=[C:6]([C@:8]2([CH2:27][F:28])[CH2:13][C@@H:12]([C:14]([F:16])([F:17])[F:15])[O:11][C:10]([NH2:18])=[N:9]2)[CH:7]=1

Participants

4

Reactant 2

HCID 811841,8-Diazabicyclo(5.4.0)undec-7-eneHCID 86732109N-((4S,6S)-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-yl)benzamide

Product 1

HCID 86732143(4S,6S)-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amineYield 81%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
65 °C

Procedure

To a solution of N-((4S,6S)-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-yl)benzamide (1i, 8.58 g, 17.98 mmol) in MeOH (50 mL) was added 1,8-diazabicyclo-[5.4.0]undec-7-ene (3.22 ml, 21.57 mmol) and the resulting mixture was heated at 65° C. for 5 h. The reaction went to completion. The mixture was concentrated, diluted with EtOAc, washed with water, saturated NH4Cl solution, dried over Na2SO4, filtered, concentrated and chromatographed on silica gel using a gradient of 0-20% EtOAc/hexanes to afford a white solid as (4S,6S)-4-(5-bromo-2-fluorophenyl)-4-(fluoromethyl)-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (5.43 g, 14.55 mmol, 81% yield). MS m/z=374.9 [M+H]+. Calculated for C12H10BrF5N2O: 373.1

Workup

  1. concentrationThe mixture was concentrated
  2. additiondiluted with EtOAc
  3. washwashed with water, saturated NH4Cl solution
  4. dry with materialdried over Na2SO4
  5. filtrationfiltered
  6. concentrationconcentrated
  7. customchromatographed on silica gel using a gradient of 0-20% EtOAc/hexanes

Sources & evidence

ORD record
ord-9a2395cb11494e8cb2dab482fae254f9
Source dataset
uspto-grants-2016_03
Patent number
US09296734B2

Reaction notes

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