Acetic Anhydride → (E)-N-(4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-enyl)benzyl)acetamide

HRID 1504693Notes

Reaction equation

HRID 1504693 reaction equation
Cl[C:2]1[CH:7]=[C:6](/[CH:8]=[CH:9]/[CH:10]([C:15]2[CH:20]=[C:19]([Cl:21])[CH:18]=[C:17]([Cl:22])[CH:16]=2)[C:11]([F:14])([F:13])[F:12])[CH:5]=[CH:4][C:3]=1[CH2:23][NH2:24].[C:25](OC(=O)C)(=[O:27])[CH3:26]>C(Cl)Cl.O>[Cl:22][C:17]1[CH:16]=[C:15]([CH:10]([C:11]([F:14])([F:12])[F:13])/[CH:9]=[CH:8]/[C:6]2[CH:7]=[CH:2][C:3]([CH2:23][NH:24][C:25](=[O:27])[CH3:26])=[CH:4][CH:5]=2)[CH:20]=[C:19]([Cl:21])[CH:18]=1

Participants

5

Reactant 2

HCID 7918Acetic AnhydrideHCID 86675181(E)-(2-chloro-4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-en-1-yl)phenyl)methanamine

Product 1

HCID 86675197(E)-N-(4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-enyl)benzyl)acetamideYield 62.2%

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a stirred solution of (E)-(2-chloro-4-(3-(3,5-dichlorophenyl)-4,4,4-trifluorobut-1-en-1-yl)phenyl)methanamine (0.3 g, 0.8 mmol) in CH2Cl2 (10 mL) was added acetic anhydride (0.12 mL, 1.14 mmol), and TEA (0.217 mL, 1.52 mmol), and the resultant reaction mixture was stirred at ambient temperature for 6 h. The reaction mixture was diluted with H2O and extracted with CH2Cl2. The combined CH2Cl2 layer was washed with brine, dried over Na2SO4, and concentrated under reduced pressure. Purification by flash column chromatography (SiO2, 100-200 mesh; 30-50% ethyl acetate in hexane) afforded the title compound as an off-white solid (0.2 g, 60%) mp 107-109° C.; 1H NMR (400 MHz, CDCl3) δ 7.37 (m, 3H), 7.28 (m, 4H), 6.60 (d, J=16.0 Hz, 1H), 6.36 (dd, J=16.0, 8.0 Hz, 1H), 5.75 (br s, 1H), 4.46 (d, J=6 Hz, 2H), 4.01 (m, 1H), 2.11 (s, 3H); ESIMS m/z 402.00 ([M+H]+).

Workup

  1. customthe resultant reaction mixture
  2. extractionextracted with CH2Cl2
  3. washThe combined CH2Cl2 layer was washed with brine
  4. dry with materialdried over Na2SO4
  5. concentrationconcentrated under reduced pressure
  6. customPurification by flash column chromatography (SiO2, 100-200 mesh; 30-50% ethyl acetate in hexane)

Sources & evidence

ORD record
ord-4ca6fbe953d94bcfafdf63f30ac3a891
Source dataset
uspto-grants-2015_12
Patent number
US09215870B2

Reaction notes

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