Sodium hydride → HCID 10243028, Verbindung

Reaktionsgleichung

[H-].[Na+].[N:3]1[CH:8]=[CH:7][CH:6]=[C:5]([CH2:9][C:10]#[N:11])[CH:4]=1.Br[CH2:13][CH2:14][CH2:15][CH2:16][C:17]([O:19][CH3:20])=[O:18]>CN(C)C=O>[C:10]([CH:9]([C:5]1[CH:4]=[N:3][CH:8]=[CH:7][CH:6]=1)[CH2:13][CH2:14][CH2:15][CH2:16][C:17]([O:19][CH3:20])=[O:18])#[N:11]

Komponenten

Versuchsvorschrift

To as suspension of 8.6 g of sodium hydride (50% dispersion in mineral oil) in 200 ml of dimethylformamide is added a solution of 17.7 g of 3-pyridylacetonitrile in 15 ml of dimethylformamide over a period of 0.5 h. The reaction mixture is stirred for a further 0.5 h at room temperature, then cooled to -20° before adding 30 g of methyl 5-bromovalerate. The reaction mixture is then allowed to warm up to room temperature over a period of several hours and left to stand for 18 h. The reaction mixture is then poured into 300 ml of ice water and extracted with 300 ml of ethyl acetate. The extract is washed with 3 portions of 75 ml of 1N hydrochloric acid and the aqueous solution neutralized with aqueous ammonia and extracted with ethyl acetate. The extract is dried over magnesium sulfate, filtered and evaporated to yield methyl 6-cyano-6-(3-pyridyl)-hexanoate.