5-(Methanesulfonyl)-2,3-dihydro-1H-indole → 5-(Methylsulfonyl)-1H-indole

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Reaction Steps

A solution of 5-methanesulfonyl-indoline (4.11 mmol) and MnO2 (20.55 mmol) in DCM (20 mL) is stirred at rt overnight. The reaction mixture is filtered and the filtrate is concentrated in vacuo to afford 5-methanesulfonyl-1H-indole (782 mg, 100%) as a solid. MS: 196 (M+H); 1H NMR (300 MHz, CDCl3): δ 3.09 (s, 3H), 6.71 (s, H), 7.39 (s, H), 7.53 (d, H), 7.74 (m, H), 8.30 (s, H), 8.66 (br, N—H).

Provenance & Evidence