Water → 3-Dibenzylamino-2,6-difluoro-benzaldehyde

HRID 1098369Notes

Reaction equation

HRID 1098369 reaction equation
[CH2:1]([N:8]([CH2:17][C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1)[C:9]1[CH:14]=[CH:13][C:12]([F:15])=[CH:11][C:10]=1[F:16])[C:2]1[CH:7]=[CH:6][CH:5]=[CH:4][CH:3]=1.C([Li])CCC.CN(C)[CH:31]=[O:32].O>O1CCCC1>[CH2:17]([N:8]([CH2:1][C:2]1[CH:3]=[CH:4][CH:5]=[CH:6][CH:7]=1)[C:9]1[C:10]([F:16])=[C:11]([C:12]([F:15])=[CH:13][CH:14]=1)[CH:31]=[O:32])[C:18]1[CH:23]=[CH:22][CH:21]=[CH:20][CH:19]=1

Participants

6

Reactant 4

HCID 962WaterHCID 6228DimethylformamideHCID 58086650Dibenzyl-(2,4-difluoro-phenyl)-amineHCID 178418339Butyllithium

Product 1

HCID 580878843-Dibenzylamino-2,6-difluoro-benzaldehyde

Reagents, catalysts & solvents 1

HCID 8028TetrahydrofuranSolvent

Procedure

To dibenzyl-(2,4-difluoro-phenyl)-amine (52, 4.30 g, 13.9 mmol) in tetrahydrofuran (60 mL), under an atmosphere of nitrogen, cooled in a −78° C. acetone/dry ice bath, was added n-butyllithium (2.50 M in hexane, 6.1 mL, 15.3 mmol) slowly. The reaction was stirred for 1 hour, N,N-dimethylformamide (1.2 mL, 15.3 mmol) was added and the reaction was allowed to warm to room temperature for 1 hour. The reaction was poured into water and extracted with ethyl acetate. The organic layer was washed with brine, dried over anhydrous sodium sulfate and filtered. The filtrate was concentrated and purified by silica gel column chromatography eluting with 10% ethyl acetate in hexane to provide the compound (53, 4.0 g, 85%). MS (ESI) [M+H+]+=337.2.

Workup

  1. extractionextracted with ethyl acetate
  2. washThe organic layer was washed with brine
  3. dry with materialdried over anhydrous sodium sulfate
  4. filtrationfiltered
  5. concentrationThe filtrate was concentrated
  6. custompurified by silica gel column chromatography
  7. washeluting with 10% ethyl acetate in hexane
  8. customto provide the compound (53, 4.0 g, 85%)

Sources & evidence

ORD record
ord-e59905c3ff9949689f6ddcf9751e09bd
Source dataset
uspto-grants-2012_03
Patent number
US08143271B2

Reaction notes

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