4-Phenylbutyric Acid → 1-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-4-phenylbutan-1-one

HRID 611096Notes

Reaction equation

HRID 611096 reaction equation
Cl.[O:2]1[C:10]2[CH2:9][CH2:8][NH:7][CH2:6][C:5]=2[CH:4]=[CH:3]1.[C:11]1([CH2:17][CH2:18][CH2:19][C:20](O)=[O:21])[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=1.C(N(CC)CC)C.C(P(=O)(OCC)OCC)#N>ClCCl.O>[O:2]1[C:10]2[CH2:9][CH2:8][N:7]([C:20](=[O:21])[CH2:19][CH2:18][CH2:17][C:11]3[CH:16]=[CH:15][CH:14]=[CH:13][CH:12]=3)[CH2:6][C:5]=2[CH:4]=[CH:3]1

Participants

7

Reactant 4

HCID 47754-Phenylbutyric AcidHCID 8471TriethylamineHCID 76257Diethyl cyanophosphonateHCID 195999414,5,6,7-Tetrahydrofuro[3,2-c]pyridine hydrochloride

Product 1

HCID 196000171-(6,7-dihydro-4H-furo[3,2-c]pyridin-5-yl)-4-phenylbutan-1-one

Reagents, catalysts & solvents 2

HCID 962WaterSolventHCID 6344DichloromethaneSolvent

Procedure

To a solution of 0.160 g (1.000 mmol) of 4,5,6,7-tetrahydrofuro[3,2-c]pyridine hydrochloride, 0.18 g (1.1 mmol) of 4-phenylbutyric acid and 0.55 ml (4.0 mmol) of triethylamine in 30 ml of dichloromethane, 0.24 g (1.5 mmol) of diethyl cyanophosphonate was added dropwise under ice-cooling, followed by overnight stirring at room temperature. The reaction mixture was poured into water and extracted with dichloromethane 2 times. The combined organic layer was washed with water and dried over anhydrous sodium sulfate; the solvent was distilled off under reduced pressure. The resulting crude product was purified by silica gel chromatography (hexane/ethyl acetate=3/1) to yield the desired product.

Workup

  1. temperaturecooling
  2. extractionextracted with dichloromethane 2 times
  3. washThe combined organic layer was washed with water
  4. dry with materialdried over anhydrous sodium sulfate
  5. distillationthe solvent was distilled off under reduced pressure
  6. customThe resulting crude product was purified by silica gel chromatography (hexane/ethyl acetate=3/1)

Sources & evidence

ORD record
ord-8f5ef54efd854ef7a701e209e9d98241
Source dataset
uspto-grants-1999_12
Patent number
US05998433

Reaction notes

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