Potassium Carbonate → 7-(2-chlorophenyl)-7-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethylheptanoic acid ethyl ester

HRID 1801546Notes

Reaction equation

HRID 1801546 reaction equation
[O:1]1[C:9]2[CH2:8][CH2:7][NH:6][CH2:5][C:4]=2[CH:3]=[CH:2]1.[CH2:10]([O:12][C:13](=[O:30])[C:14]([CH3:29])([CH3:28])[CH2:15][CH2:16][CH2:17][CH2:18][CH:19](Br)[C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=1[Cl:26])[CH3:11].C(=O)([O-])[O-].[K+].[K+]>CN(C=O)C>[CH2:10]([O:12][C:13](=[O:30])[C:14]([CH3:29])([CH3:28])[CH2:15][CH2:16][CH2:17][CH2:18][CH:19]([C:20]1[CH:25]=[CH:24][CH:23]=[CH:22][C:21]=1[Cl:26])[N:6]1[CH2:7][CH2:8][C:9]2[O:1][CH:2]=[CH:3][C:4]=2[CH2:5]1)[CH3:11]

Participants

5

Reactant 3

HCID 11430Potassium CarbonateHCID 152899484,5,6,7-Tetrahydrofuro[3,2-C]pyridineHCID 675123617-Bromo-7-(2-chlorophenyl)-2,2-dimethylheptanoic acid ethyl ester

Product 1

HCID 569713827-(2-chlorophenyl)-7-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethylheptanoic acid ethyl esterYield 48.1%

Reagents, catalysts & solvents 1

HCID 6228DimethylformamideSolvent

Conditions

Temperature
65 °C

Procedure

4,5,6,7-Tetrahydrofuro[3,2-c]pyridine (0.16 g, 1.3 mmol), 7-bromo-7-(2-chlorophenyl)-2,2-dimethylheptanoic acid ethyl ester (0.49 g, 1.3 mmol) in DMF (13 mL), and potassium carbonate (0.27 g, 1.95 mmol) were combined under an argon atmosphere at room temperature. The mixture was heated to 65° C. overnight under an argon atmosphere. The reaction continued at 65° C. for 48 hours. After cooling to room temperature and concentration under reduced pressure, the crude product (0.28 g) was purified by column chromatography (silica gel, ethyl acetate/heptane=1/20 to 1/5) to afford 7-(2-chlorophenyl)-7-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-2,2-dimethylheptanoic acid ethyl ester (Compound Ij, 0.26 g, 48.1% yield) as a yellow oil. 1H NMR (Field: 300 MHz, Solvent: CDCl3/TMS) δ (ppm): 7.42 (d, 1H, J=7.5 Hz), 7.29 (d, 1H, J=7.2 Hz), 7.17 (t, 1H, J=8.7 Hz), 7.14 (s, 1H), 7.09 (t, 1H, J=8.1 Hz), 6.08 (s, 1H), 4.12 (t, 1H, J=4.2 Hz), 4.01 (q, 2H, J=7.2 Hz), 3.98 (d, 1H, J=14.4 Hz), 3.26 (d, 1H, J=13.5 Hz), 2.79-2.53 (m, 4H), 1.90-1.73 (m, 2H), 1.35-1.32 (m, 2H), 1.20-1.06 (m, 7H), 1.04 (s, 6H). 13C NMR (Field: 75 MHz, Solvent: CDCl3/TMS) δ (ppm): 177.91, 148.97, 140.89, 139.39, 134.93, 129.50, 129.00, 128.02, 126.84, 115.82, 108.84, 63.33, 60.54, 47.61, 47.51, 42.28, 40.78, 33.21, 26.23, 25.35, 24.65, 14.50.

Workup

  1. customwere combined under an argon atmosphere at room temperature
  2. temperatureAfter cooling to room temperature
  3. concentrationconcentration under reduced pressure
  4. customthe crude product (0.28 g) was purified by column chromatography (silica gel, ethyl acetate/heptane=1/20 to 1/5)

Sources & evidence

ORD record
ord-7a3bf0fc764f4c2c854e46118e8ed608
Source dataset
uspto-grants-2013_01
Patent number
US08349833B2

Reaction notes

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