Hexanal → Methyl 5-[{4-[(4-butylphenyl)ethynyl]benzyl}(hexyl)amino]-2-fluorobenzoate

HRID 551932Notes

Reaction equation

HRID 551932 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].[CH:32](=O)[CH2:33][CH2:34][CH2:35][CH2:36][CH3:37].C(O[BH-](OC(=O)C)OC(=O)C)(=O)C.[Na+]>ClCCCl.O>[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]([CH2:32][CH2:33][CH2:34][CH2:35][CH2:36][CH3:37])[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 3

HCID 6184HexanalHCID 5049666Sodium triacetoxyborohydrideHCID 11452740Methyl 5-({4-[(4-butylphenyl)ethynyl]benzyl}amino)-2-fluorobenzoate

Product 1

HCID 57554578Methyl 5-[{4-[(4-butylphenyl)ethynyl]benzyl}(hexyl)amino]-2-fluorobenzoateYield 77%

Reagents, catalysts & solvents 2

HCID 111,2-DichloroethaneSolventHCID 962WaterSolvent

Conditions

Temperature
70 °C

Procedure

To a suspension of methyl 5-({4-[(4-butylphenyl)ethynyl]benzyl}amino)-2-fluorobenzoate (500 mg, 1.20 mmol) in anhydrous DCE (8 mL) were added hexanal (0.25 mL, 2.07 mmol) and sodium triacetoxyborohydride (825 mg, 3.89 mmol). The reaction mixture was stirred at 70° C. for 3.5 hrs. Then the reaction mixture was diluted with water (10 mL) and extracted with DCM (2×10 mL). The combined organic layers were dried over MgSO4 and the solvents were removed under reduced pressure. Purification by flash chromatography on silicagel (cHex/EtOAc) gave 460 mg (77%) of the title compound as a pale yellow oil. HPLC, Rt: 6.3 min (purity: 99.9%). 1H NMR (CDCl3) δ: 7.47 (d, J=8.3 Hz, 2H), 7.44 (d, J=8.3 Hz, 2H), 7.18 (m, 5H), 6.95 (dd, J=10.1, 9.0 Hz, 1H), 6.74 (m, 1H), 4.52 (s, 2H), 3.91 (s, 3H), 3.38 (t, J=7.7 Hz, 2H), 2.63 (t, J=7.7 Hz, 2H), 1.60 (m, 4H), 1.42-1.25 (m, 8H), 0.92 (m, 6H).

Workup

  1. extractionextracted with DCM (2×10 mL)
  2. dry with materialThe combined organic layers were dried over MgSO4
  3. customthe solvents were removed under reduced pressure
  4. customPurification by flash chromatography on silicagel (cHex/EtOAc)

Sources & evidence

ORD record
ord-c1c8c0dc5bbf4e1780d8cb8bfb98cca4
Source dataset
uspto-grants-2011_05
Patent number
US07947851B2

Reaction notes

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