[C:1]([C:4]1[CH2:9][CH2:8][CH2:7][NH:6][CH:5]=1)(=[O:3])[CH3:2].[H-].[Na+].CN(C)C=O.Br[CH:18]([CH3:20])[CH3:19]>O>[CH3:19][CH:18]([N:6]1[CH2:7][CH2:8][CH2:9][C:4]([C:1]([CH3:2])=[O:3])=[CH:5]1)[CH3:20]3-acetyl-1,4,5,6-tetrahydropyridine (20.0 g, 0.16 mole) was added under nitrogen to a mixture of sodium hydride (5.76 g, 0.24 mole) and dry dimethylformamide (50 ml) stirring at 0°C. and stirring was continued for 15 minutes 2-Bromopropane (21.5 g, 0.175 mole) was then added dropwise over 15 min, stirring continued for a further hour at 0°C. then overnight at room temperature. The reaction mixture was cautiously added to iced water (100 g) under nitrogen and extracted with diethyl ether (3×100 ml). The combined organic phase was extracted with water (150 ml), dried over magnesium sulphate, concentrated under reduced pressure to give methyl 1-(1-methylethyl)- 1,4,5,6-tetrahydro-3-pyridyl ketone (1). The product was distilled as a pale yellow oil (b.pt 97-98°C./0.5 mm Hg)
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