Monochloramine → 6-Methanesulfonyl-indole-1-ylamine

Participants

Reaction Steps

A solution of 6-methanesulfonyl-1H-indole (2.66 mmol) and potassium tert-butoxide (5.32 mmol) in DMF (15 mL) is stirred at rt under N2 for 2 h. 0.15 M NH2Cl in ether (26.6 mL) is added drop-wise for 15 minutes at rt and the reaction mixture is stirred at rt for 2 h. The reaction mixture is quenched with 10% Na2S2O3 aqueous solution, and extracted with ether (3×20 mL). The combined organic layer is washed with brine (20 mL), dried (Na2SO4), filtered and concentrated in vacuo. The residue is triturated with EtOAc to give 6-methanesulfonyl-indole-1-ylamine (270 mg, 51%) as a solid. MS: 211 (M+H); 1H NMR (300 MHz, CDCl3): δ 3.09 (s, 3H), 6.49 (d, H), 7.41 (m, H), 7.61 (d, H), 7.71 (d, H), 8.12 (s, H).

Provenance & Evidence