Ammonium Hydroxide → 2-(4-Cyano-phenyl)-3-cyclopentyl-propionic acid methyl ester

HRID 1860224Notes

Reaction equation

[CH3:1][O:2][C:3](=[O:18])[CH:4]([C:11]1[CH:16]=[CH:15][C:14](Br)=[CH:13][CH:12]=1)[CH2:5][CH:6]1[CH2:10][CH2:9][CH2:8][CH2:7]1.[Cu](C#N)[C:20]#[N:21].[OH-].[NH4+]>CN(C)C=O.O>[CH3:1][O:2][C:3](=[O:18])[CH:4]([C:11]1[CH:16]=[CH:15][C:14]([C:20]#[N:21])=[CH:13][CH:12]=1)[CH2:5][CH:6]1[CH2:10][CH2:9][CH2:8][CH2:7]1

Participants

Conditions

Temperature: 25 °C

Procedure

A solution of 2-(4-bromo-phenyl)-3-cyclopentyl-propionic acid methyl ester (1.55 g, 5.0 mmol) in N,N-dimethylformamide (12.5 mL) was treated with copper cyanide (672 mg, 7.5 mmol). This mixture was heated at reflux for 21 h. The reaction mixture was cooled to 25° C. and poured into aqueous ammonium hydroxide (25 mL). The resulting solution was diluted with water (25 mL). This solution was extracted with ethyl acetate (3×50 mL). The organics were washed with a saturated aqueous sodium chloride solution (3×75 mL), dried over sodium sulfate and magnesium sulfate, filtered, and concentrated in vacuo. Flash chromatography (Merck Silica gel 60, 230-400 mesh, 90/10 hexanes/ethyl acetate) afforded 2-(4-cyano-phenyl)-3-cyclopentyl-propionic acid methyl ester (1.17 g, 91.3%) as a clear oil; EI-HRMS m/e calcd for C16H19NO2 (M+) 257.1415 found 257.1406.

Workup

temperatureThis mixture was heated
temperatureat reflux for 21 h
extractionThis solution was extracted with ethyl acetate (3×50 mL)
washThe organics were washed with a saturated aqueous sodium chloride solution (3×75 mL)
dry with materialdried over sodium sulfate and magnesium sulfate
filtrationfiltered
concentrationconcentrated in vacuo

Sources & evidence

ORD record: ord-dc55b9ba3639470ebb6aa092b3c647ff
Source dataset: uspto-grants-2003_03
DOI: 10.6084/m9.figshare.5104873.v1
Patent number: US06528543B1

Reaction notes

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