1-Acetylindoline-5-sulfonamide → 1-ethyl-2,3-dihydro-1H-indole-5-sulfonamide

関与物質

反応手順

To a suspension of 1-acetylindoline-5-sulfonamide (Intermediate 52A, 120 mg, 0.50 mmol) in THF (2.0 mL) was added BH3.THF (5.0 mL, 5.0 mmol, 1.0M solution in THF). The resulting reaction mixture was stirred at room temperature for 1 h, then quenched carefully with MeOH and concentrated in vacuo to give the title compound (115 mg, 100%) as a white solid. 1H NMR (CD3OD) δ 7.56 (dd, J=8.4, 2.0 Hz, 1H), 7.48 (d, J=1.6 Hz, 1H), 6.46-6.44 (m, 1H), 3.51 (t, J=8.6 Hz, 2H), 3.24-3.20 (m, 2H), 2.99 (t, J=8.5 Hz, 2H), 1.17-1.13 (m, 3H); MS(ESI+) m/z 227.2 (M+H)+.

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