Benzoyl chloride → HCID 69037395, compound

Participants

Reaction Steps

Ethyl 5-nitroindole-2-carboxylate (3.1) (1.5 g, 6.41 mmol) in CH2Cl2 (30 ml) was treated with benzoyl chloride (1.19 ml, 10.26 mmol), Et3N (891 μl, 6.41 mmol) and DMAP (783 mg, 6.41 mmol). The mixture was stirred for 16 h. 10% NaHCO3 (10 ml) and CH2Cl2 (10 ml) were added and the organic layer was separated. The aqueous layer was extracted with CH2Cl2 (3×5 mL). The combined organic layers were washed with H2O (10 ml), 5% HCl (10 ml) and H2O (10 ml). The solution was dried (MgSO4) and concentrated. The 10 residue was crystalised from EtOAc/Hex 1:9 to afford 1.85 g (87%) of 3.2 as a yellow powder: 1H NMR (250 MHz, CDCl3) δ ppm 8.66 (d, 1H), 8.25 (d, 1H), 7.80 (d,1H), 7.6-7.72 (m, 3H), 7.48 (m, 3H), 4.00 (q, 2H), 1.10 (t, 3H). FABMS (NBA/NaI) m/z 339 (M+H+ expected 339)

Provenance & Evidence