Nitromethane → 6-bromo-1-methyl-2-(2-nitrovinyl)-1H-indole

Participants

Reaction Steps

A solution of 6-bromo-1-methyl-1H-indole-2-carbaldehyde (422 mg, 1.77 mmol) and NH4OAc (137 mg, 1.77 mmol) in MeNO2 (10.0 mL) was heated to reflux for 2 h. The mixture was cooled to room temperature and partitioned between water and EtOAc. The aqueous phase was separated and extracted with EtOAc (3×). The organic extracts were dried over Na2SO4, filtered and concentrated to give title compound (490 mg, 99%) as an orange solid: 1H NMR (500 MHz, CDCl3) δ 8.12 (d, J=13.0 Hz, 1H), 7.67 (d, J=13.5 Hz, 1H), 7.53 (s, 1H), 7.50 (d, J=8.5 Hz, 1H), 7.26 (dd, J=8.5, 1.5 Hz, 1H), 7.05 (s, 1H), 3.84 (s, 3H).

Provenance & Evidence