Sodium hydride → 1-(4-Nitro-phenyl)-cyclohexanecarbonitrile

Beteiligte Stoffe

Reaktionsschritte

A slurry of NaH (711 mg, 29.6 mmol) in DMSO (10 mL) and THF (3 mL) was treated portionwise slowly with (4-nitro-phenyl)-acetonitrile (2.00 g, 12.3 mmol) and stirred at RT for 5 min until H2 evolution ceased. A solution of dibromopentane (2.02 mL, 14.8 mmol) in THF (10 mL) was added to the slurry over 10 min. The mixture was stirred at RT for an additional 5 min, placed in an oil bath at RT, slowly warmed to 70° C., and stirred at 70° C. for 1 h. The cooled mixture was diluted with EtOAc (250 mL) and washed with water (3×100 mL) and brine (2×100 mL). The combined aqueous layers were extracted with EtOAc (1×100 mL). The combined organic layers were dried over MgSO4 and concentrated in vacuo. Silica gel chromatography of the residue on a 50-g Varian MegaBond Elut SPE column with 10% EtOAc-hexane afforded the title compound (1.46 g, 51%) as a tan solid. 1H-NMR (CDCl3; 400 MHz): δ 8.26 (d, 2H, J=8.4 Hz), 7.69 (d, 2H, J=8.4 Hz), 2.21-2.13 (m, 2H), 1.98-1.74 (m, 8H).

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