Tetrahydrofuran → 2-(3-Cyclohexyl-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester

HRID 2045316Notes

Reaction equation

HRID 2045316 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].[Br-].[CH:27]1([Zn+])[CH2:32][CH2:31][CH2:30][CH2:29][CH2:28]1.O1CCCC1.[Cl-].[NH4+]>O1CCOCC1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.C1C=CC(P(C2C=CC=CC=2)[C-]2C=CC=C2)=CC=1.Cl[Pd]Cl.[Fe+2].CN(C=O)C>[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]([CH:27]3[CH2:32][CH2:31][CH2:30][CH2:29][CH2:28]3)[CH:17]=1)[C:10]([CH3:25])([CH3:24])[CH2:9]2)=[O:5])[CH3:2]

Participants

8

Reactant 4

HCID 8028TetrahydrofuranHCID 25517Ammonium ChlorideHCID 674437712-(3-Bromo-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl esterHCID 178418970HCID 178418970, compound

Product 1

HCID 674417422-(3-Cyclohexyl-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl esterYield 51%

Reagents, catalysts & solvents 3

HCID 178418228Bis(cyclopenta-1,4-dien-1-yl(diphenyl)phosphane);dichloropalladium;iron(2+)CatalystHCID 6228DimethylformamideSolventHCID 312751,4-DioxaneSolvent

Conditions

Temperature
70 °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), cyclohexylzinc bromide solution 0.5 M in tetrahydrofuran (3.0 mL, 1.5 mmol), 1,1′-bis(diphenylphosphino) ferrocenedichloropalladium (II) (41 mg, 0.05 mmol), and DMF (0.5 mL) in dioxane (3 mL) was stirred at 70° C. for 2 hours. Then treated with saturated ammonium chloride (20 mL), extracted with ether (100 mL). After removal of solvent, the residue was purified on flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company)(10% ethyl acetate/hexanes) to afford 2-(3-cyclohexyl-5-fluoro-phenyl)-3,3-dimethyl-1,2,3,4-tetrahydro-quinoline-6-carboxylic acid ethyl ester (0.21 g, 51%) as a white solid: LC/MS m/e calcd for C26H32FNO2 M+: 410.6, observed: 410.1.

Workup

  1. extractionextracted with ether (100 mL)
  2. customAfter removal of solvent
  3. customthe residue was purified on flash silica gel chromatography (silica gel from QingDao, 200-300 mesh, glass column from Shanghai SD company)(10% ethyl acetate/hexanes)

Sources & evidence

ORD record
ord-69ca215d2f994292b20c216fcff95c8d
Source dataset
uspto-grants-2013_11
Patent number
US08586747B2

Reaction notes

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