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

HRID 930287Notes

Reaction equation

HRID 930287 reaction equation
[Br:1][C:2]1[CH:3]=[CH:4][C:5]([F:28])=[C:6]([C@:8]2([CH3:27])[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:28])=[C:6]([C@:8]2([CH3:27])[CH2:13][C@@H:12]([C:14]([F:16])([F:15])[F:17])[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 86732116N-((4S,6S)-4-(5-bromo-2-fluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-yl)benzamide

Product 1

HCID 86732119(4S,6S)-4-(5-bromo-2-fluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amineYield 95.9%

Reagents, catalysts & solvents 1

HCID 887MethanolSolvent

Conditions

Temperature
65 °C

Procedure

A solution of N-((4S,6S)-4-(5-bromo-2-fluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-yl)benzamide (4 g, 789 mg, 1.718 mmol) in anhydrous MeOH (20 mL) was treated with 1,8-diazabicyclo-[5.4.0]undec-7-ene (Aldrich; 311 μL, 2.063 mmol) and heated to 65° C. for 16 h. The reaction mixture was concentrated and extracted into EtOAc from saturated aqueous NH4Cl. The organic extract was dried over MgSO4, concentrated, and purified by flash chromatography on silica gel (Gradient: 0%→50% EtOAc/hexane) to give (4S,6S)-4-(5-bromo-2-fluorophenyl)-4-methyl-6-(trifluoromethyl)-5,6-dihydro-4H-1,3-oxazin-2-amine (585 mg, 1.647 mmol) as a white foam. MS m/z=355 M+. Calculated for C12H11BrF4N2O: 355.1

Workup

  1. concentrationThe reaction mixture was concentrated
  2. extractionextracted into EtOAc from saturated aqueous NH4Cl
  3. extractionThe organic extract
  4. dry with materialwas dried over MgSO4
  5. concentrationconcentrated
  6. custompurified by flash chromatography on silica gel (Gradient: 0%→50% EtOAc/hexane)

Sources & evidence

ORD record
ord-c6be71be6dd44e3db2a668b28a9bf435
Source dataset
uspto-grants-2016_03
Patent number
US09296734B2

Reaction notes

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