Ethyl Acetate → 2-(3-Fluoro-5-pyrrolidin-1-yl-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

HRID 2045296Notes

Reaction equation

HRID 2045296 reaction equation
[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:21]=[C:20]([F:22])[CH:19]=[C:18](Br)[CH:17]=1)[C:10]([CH3:25])([CH3:24])[CH2:9]2)=[O:5])[CH3:2].[NH:26]1[CH2:30][CH2:29][CH2:28][CH2:27]1.[OH-].[K+].C(OCC)(=O)C>CS(C)=O.[Cu]I>[CH2:1]([O:3][C:4]([C:6]1[CH:7]=[C:8]2[C:13](=[CH:14][CH:15]=1)[NH:12][CH:11]([C:16]1[CH:17]=[C:18]([N:26]3[CH2:30][CH2:29][CH2:28][CH2:27]3)[CH:19]=[C:20]([F:22])[CH:21]=1)[C:10]([CH3:25])([CH3:24])[CH2:9]2)=[O:5])[CH3:2]

Participants

7

Reactant 4

HCID 8857Ethyl AcetateHCID 14797Potassium HydroxideHCID 31268PyrrolidineHCID 674437712-(3-Bromo-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

Product 1

HCID 674412082-(3-Fluoro-5-pyrrolidin-1-yl-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl esterYield 45.4%

Reagents, catalysts & solvents 2

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

Conditions

Temperature
120 °C

Procedure

A mixture of 2-(3-bromo-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (0.41 g, 1.0 mmol), pyrrolidine (0.21 g, 3.0 mmol), copper (I) iodide (0.11 g, 0.6 mmol) and potassium hydroxide (33.6 mg, 0.6 mmol) in DMSO (2 mL) was heated for 3 hours at 120° C. After cooling to room temperature, the mixture was treated with ethyl acetate (50 mL) and washed with water (20 mL). The organic layer was dried over anhydrous sodium sulfate and concentrated in vacuo. Purification on flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company)(20% ethyl acetate/hexanes) to afford 2-(3-fluoro-5-pyrrolidin-1-yl-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (0.18 g, 45%) as a white solid: LC/MS m/e calcd for C24H29FN2O2 (M+H)+: 397.5, observed: 397.3.

Workup

  1. temperatureAfter cooling to room temperature
  2. washwashed with water (20 mL)
  3. dry with materialThe organic layer was dried over anhydrous sodium sulfate
  4. concentrationconcentrated in vacuo
  5. customPurification on flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company)(20% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-35737407a3a64bbea5fbfe1bcc936260
Source dataset
uspto-grants-2013_11
Patent number
US08586747B2

Reaction notes

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