Dichloromethane → Methyl 5-[{4-[(4-butylphenyl)ethynyl]benzyl}(3,3-dimethylbutyl)amino]-2-fluorobenzoate

HRID 551953Notes

Reaction equation

HRID 551953 reaction equation
[CH2:1]([C:5]1[CH:10]=[CH:9][C:8]([C:11]#[C:12][C:13]2[CH:31]=[CH:30][C:16]([CH2:17][NH:18][C:19]3[CH:20]=[CH:21][C:22]([F:29])=[C:23]([CH:28]=3)[C:24]([O:26][CH3:27])=[O:25])=[CH:15][CH:14]=2)=[CH:7][CH:6]=1)[CH2:2][CH2:3][CH3:4].[CH3:32][C:33]([CH3:38])([CH3:37])[CH2:34][CH:35]=O.C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+].ClCCl>ClCCCl>[CH2:1]([C:5]1[CH:6]=[CH:7][C:8]([C:11]#[C:12][C:13]2[CH:14]=[CH:15][C:16]([CH2:17][N:18]([CH2:35][CH2:34][C:33]([CH3:38])([CH3:37])[CH3:32])[C:19]3[CH:20]=[CH:21][C:22]([F:29])=[C:23]([CH:28]=3)[C:24]([O:26][CH3:27])=[O:25])=[CH:30][CH:31]=2)=[CH:9][CH:10]=1)[CH2:2][CH2:3][CH3:4]

Participants

6

Reactant 4

HCID 6344DichloromethaneHCID 763353,3-DimethylbutanalHCID 5049666Sodium triacetoxyborohydrideHCID 11452740Methyl 5-({4-[(4-butylphenyl)ethynyl]benzyl}amino)-2-fluorobenzoate

Product 1

HCID 67170689Methyl 5-[{4-[(4-butylphenyl)ethynyl]benzyl}(3,3-dimethylbutyl)amino]-2-fluorobenzoateYield 56.1%

Reagents, catalysts & solvents 1

HCID 111,2-DichloroethaneSolvent

Conditions

Temperature
70 °C

Procedure

Methyl 5-({4-[(4-butylphenyl)ethynyl]benzyl}amino)-2-fluorobenzoate (800 mg, 1.93 mmol) was dissolved in DCE (15 mL), then 3,3-dimethyl-butyraldehyde (289 mg, 2.89 mmol) was added followed by sodium triacetoxyborohydride (Aldrich, 1224 mg, 5.78 mmol) and the resulting mixture stirred at 70° C. for 2 h. Reaction was allowed to cool down, dichloromethane (40 mL) was added and the organic layer was washed twice with H2O and once with brine, dried over MgSO4, filtered and concentrated under reduced pressure. Purification on silicagel afforded 541 mg (56%) of the title compound as a colorless oil. HPLC, Rt: 6.42 min, purity: 98.3%); LC/MS, M+(ESI): 500.4; 1H NMR (CDCl3) δ: 7.44 (m, 4H), 7.17 (m, 5H), 6.93 (t, J=9.6 Hz, 1H), 6.73 (m, 1H), 4.46 (s, 2H), 3.88 (s, 3H), 3.40 (m, 2H), 2.60 (t, J=7.7 Hz, 2H), 1.70-1.46 (m, 4H), 1.34 (m, 2H), 0.99-0.87 (m, 12H).

Workup

  1. customReaction
  2. temperatureto cool down
  3. washthe organic layer was washed twice with H2O and once with brine
  4. dry with materialdried over MgSO4
  5. filtrationfiltered
  6. concentrationconcentrated under reduced pressure
  7. customPurification on silicagel

Sources & evidence

ORD record
ord-7c11ced0411546f9bd321a8ed8a98987
Source dataset
uspto-grants-2011_05
Patent number
US07947851B2

Reaction notes

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