Formamide → HCID 66968825, compound

Participants

Reaction Conditions

Reaction Steps

4-Propylaniline (2.70 g, 20 mmol) was added dropwise to a solution of 4-cyanophenacyl bromide (2.20 g, 10 mmol) in DMF (5 mL). This solution was then added to hot (180° C.) formamide (20 mL) over 5 min, and the combined solution was allowed to stir at 180° C. for 2 h. The cooled solution was then poured onto ice (100 mL), and extracted with ether (2×75 mL). After drying and concentrating, the resulting dark oil was purified by chromatography (3:1:2 hexanes:EtOAc:CH2Cl2). The first product (510 mg) was identified as 4-(5-propyl-1H-indol-3-yl)-benzonitrile, mp 140° C. The second fraction (275 mg) was identified as the desired imidazole: mp 133° C.; 1H NMR (400 MHz, CDCl3) δ 7.95 (d, J=6 Hz, 2H), 7.90 (s, 1H), 7.70 (d, J=6 Hz, 2H), 7.68 (s, 1H), 7.38 (d, J=4 Hz, 2H), 7.31 (d, J=4 Hz, 2H), 2.69 (t, J=8.9 Hz, 2H), 1.68 (m, 2H), 0.98 (t, J=7.5 Hz, 3H); ESIMS m/z 288.1 (M+H).

Provenance & Evidence