1,4-Dibromobutane → 1-[4-(3-Pyrrolidin-1-ylpropoxy)phenyl]cyclo-pentane-carbonitrile

Participants

Reaction Conditions

Reaction Steps

To a suspension of NaH (60%, 0.574 g, 14.35 mmol) in DMF (8 mL) at 0° C. was added dropwise [4-(3-pyrrolidin-1-ylpropoxy)phenyl]acetonitrile (1 g, 4.10 mmol) in DMF (3 mL). The reaction mixture was stirred at 0° C. for 5 min than at room temperature for 30 min. After cooling to 0° C., 1,4-dibromobutane (0.980 mL, 8.2 mmol) in DMF (2 mL) was added dropwise. The reaction mixture was allowed to warm up to room temperature then heated to 50° C. overnight. It was poured into ice-cold water and extracted with DCM. The combined organic extracts were washed with brine, dried over Na2SO4, filtered and concentrated in vacuo. The crude mixture was purified by column chromatography, eluting with a gradient of DCM:MeOH:NH3 (from 99:0:1 to 90:10:1) to give the title compound (0.443 g, 36%). 1H NMR (400 MHz, DMSO-d6) δ7.29 (d, 2H), 6.79 (d, 2H), 4.02 (m, 2H), 3.18 (m, 2H), 2.47-2.28 (m, 4H), 2.19-1.75 (m, 11H), 1.19 (m, 3H).

Provenance & Evidence