2-(Ethylamino)ethanol → 2-[{2-[6-amino-5-(methyloxy)-2,3-dihydro-1H-indol-1-yl]-2-oxoethyl}(ethyl)amino]ethanol

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Reaction Steps

The 1-(bromoacetyl)-5-(methyloxy)-6-nitro-2,3-dihydro-1H-indole (4.0 g, 12.7 mmol) was dissolved in 50 mL of dicholomethane, then K2CO3 (4.4 g, 31.7 mmol) and 2-(ethylamino)ethanol (2.3 g, 25.4 mmol) in 10 mL dichloromethane were added, the reaction was stirred at RT for 3 hours. After filtration, the organic layers were washed with water (2×100 mL)and dried over Na2SO4. The solvent was removed to yield the 2-[{2-[6-amino-5-(methyloxy)-2,3-dihydro-1H-indol-1-yl]-2-oxoethyl}(ethyl)amino]ethanol as a yellow solid (3.77 g, 92%).1HNMR (400 MHz, DMSO-d6) δ ppm: 0.94 (t, J=7.14 Hz,3 H), 2.45 (s, 2 H), 2.60 (m, 4 H), 3.18 (t, J=8.42 Hz, 2 H), 3.40 (t, J=6.13 Hz,2H), 3.84 (s, 3 H), 4.19 (t, J=8.51 Hz, 2 H), 7.29 (s, 1 H), 8.43 (s, 1 H).

Provenance & Evidence