Aminoisobutyric acid → HCID 56966931, compound

HRID 1036903Notes

Reaction equation

HRID 1036903 reaction equation
Br[C:2]1[CH:3]=[C:4]([CH:8]2[CH2:17][C:16]([CH3:19])([CH3:18])[C:15]3[C:10](=[CH:11][CH:12]=[C:13]([CH3:20])[CH:14]=3)[NH:9]2)[CH:5]=[CH:6][CH:7]=1.[NH2:21][C:22]([CH3:27])([CH3:26])[C:23]([OH:25])=[O:24].C(=O)([O-])[O-].[K+].[K+]>CS(C)=O.[Cu]I>[CH3:26][C:22]([NH:21][C:2]1[CH:7]=[CH:6][CH:5]=[C:4]([CH:8]2[CH2:17][C:16]([CH3:19])([CH3:18])[C:15]3[C:10](=[CH:11][CH:12]=[C:13]([CH3:20])[CH:14]=3)[NH:9]2)[CH:3]=1)([CH3:27])[C:23]([OH:25])=[O:24]

Participants

6

Reactant 3

HCID 6119Aminoisobutyric acidHCID 11430Potassium CarbonateHCID 67290538HCID 67290538, compound

Product 1

HCID 56966931HCID 56966931, compound

Reagents, catalysts & solvents 2

HCID 24350Copper(1+) iodide; Copper(I) iodide; Cuprous iodide; Cuprous iodide (CuI)CatalystHCID 679Dimethyl SulfoxideSolvent

Procedure

A solution of 2-(3-bromo-phenyl)-4,4,6-trimethyl-1,2,3,4-tetrahydro-quinoline (329.0 mg, 1.0 mmol), copper(I) iodide (57.0 mg, 0.3 mmol), 2-amino-2-methyl-propionic acid (309.0 mg, 3.0 mmol) and potassium carbonate (415.0 mg, 3.0 mmol) in dimethyl sulfoxide (2.0 mL) was stirred at 120° C. for 16 h. Then the reaction mixture was cooled to room temperature and extracted with ethyl acetate (150 mL×2), washed with water (50 mL×2) and saturated aqueous ammonium chloride solution (50 mL×2), dried over anhydrous sodium sulfate and then concentrated in vacuo. Purification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% ammonium hydroxide in water) 2-methyl-2-[3-(4,4,6-trimethyl-1,2,3,4-tetrahydro-quinolin-2-yl)-phenylamino]-propionic acid (104.8 mg, 29%) as a white solid: LC/MS m/e obsd. (ESI+) [(M+H)+] 353.1.

Workup

  1. extractionextracted with ethyl acetate (150 mL×2)
  2. washwashed with water (50 mL×2) and saturated aqueous ammonium chloride solution (50 mL×2)
  3. dry with materialdried over anhydrous sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customPurification by Waters automated flash system (column: Xterra 30 mm×100 mm, sample manager 2767, pump 2525, detector: ZQ mass and UV 2487, solvent system: acetonitrile and 0.1% ammonium hydroxide in water) 2-methyl-2-[3-(4,4,6-trimethyl-1,2,3,4-tetrahydro-quinolin-2-yl)-phenylamino]-propionic acid (104.8 mg, 29%) as a white solid

Sources & evidence

ORD record
ord-370c82461e7f45ae980019fe28f05aa5
Source dataset
uspto-grants-2013_10
Patent number
US08546427B2

Reaction notes

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