Isobutyraldehyde → Ethyl [(1-isopropyl-4,4,7-trimethyl-1,2,3,4-tetrahydroquinolin-6-yl)isobutylamino]benzoate

HRID 365525Notes

Reaction equation

HRID 365525 reaction equation
[CH:1]([N:4]1[C:13]2[C:8](=[CH:9][C:10]([NH:15][C:16]3[CH:26]=[CH:25][CH:24]=[CH:23][C:17]=3[C:18]([O:20][CH2:21][CH3:22])=[O:19])=[C:11]([CH3:14])[CH:12]=2)[C:7]([CH3:28])([CH3:27])[CH2:6][CH2:5]1)([CH3:3])[CH3:2].[CH:29](=O)[CH:30]([CH3:32])[CH3:31].C([BH3-])#N.[Na+].[OH-].[Na+]>C(O)(=O)C.C(#N)C>[CH:1]([N:4]1[C:13]2[C:8](=[CH:9][C:10]([N:15]([C:16]3[CH:26]=[CH:25][CH:24]=[CH:23][C:17]=3[C:18]([O:20][CH2:21][CH3:22])=[O:19])[CH2:29][CH:30]([CH3:32])[CH3:31])=[C:11]([CH3:14])[CH:12]=2)[C:7]([CH3:28])([CH3:27])[CH2:6][CH2:5]1)([CH3:3])[CH3:2]

Participants

7

Reactant 4

HCID 6561IsobutyraldehydeHCID 14798Sodium HydroxideHCID 5003444Sodium cyanoborohydrideHCID 86755923Ethyl [(1-isopropyl-4,4,7-trimethyl-1,2,3,4-tetrahydroquinolin-6-yl)amino)benzoate2×

Product 1

HCID 53918247Ethyl [(1-isopropyl-4,4,7-trimethyl-1,2,3,4-tetrahydroquinolin-6-yl)isobutylamino]benzoateYield 34.4%

Reagents, catalysts & solvents 2

HCID 176Acetic AcidSolventHCID 6342AcetonitrileSolvent

Procedure

Ethyl [(1-isopropyl-4,4,7-trimethyl-1,2,3,4-tetrahydroquinolin-6-yl)amino)benzoate (Compound 20, 0.12 g, 0.32 mmol) was dissolved in a 10% acetic acid in acetonitrile solution (2.0 mL). The solution was treated with isobutyraldehyde (0.10 mL, 1.1 mmol) and then sodium cyanoborohydride (22 mg, 0.35 mmol) and the reaction stirred at room temperature for 7 hours. 1 M aqueous NaOH was added until pH=6 was reached and the solution was extracted with ether (2×), washed with brine, and dried (Na2SO4). The filtered solution was concentrated under reduced pressure and the residue purified using flash column chromatography (10% ethyl acetate in hexanes) to give the title compound (48 mg) as an oil.

Workup

  1. extractionthe solution was extracted with ether (2×)
  2. washwashed with brine
  3. dry with materialdried (Na2SO4)
  4. concentrationThe filtered solution was concentrated under reduced pressure
  5. customthe residue purified

Sources & evidence

ORD record
ord-6d6113f740af4727a3d9a05ec62a5eb6
Source dataset
uspto-grants-2000_10
Patent number
US06127382

Reaction notes

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