To a clean Biotage microwave vial was added 1-(1H-indol-3-yl)ethanone (0.023 grams, 0.143 mmol, purchased from Fisher Scientific), 1-(3-azidopropyl)-5-methylindoline-2,3-dione (0.02 grams, 0.082 mmol) and 0.27 mL of methanol. After the addition of 9.0 μL of dimethyl amine (40% by weight solution in water, purchased from Fisher Scientific), the vial was sealed and heated in a Biotage Initiator for ten minutes at 130° C. It was then concentrated and purified using a Teledyne ISCO hexanes/ethyl acetate gradient on silica gel. A subsequent purification was done using a preparative thin layer chromatography (ethyl acetate, hexanes (2:1)). Yield 14%. 1H-NMR δ 8.87 (bs, 1H), 8.34 (m, 1H), 7.76 (s, 1H), 7.40 (m, 1H), 7.29 (m, 3H), 7.10 (d, 1H), 6.77 (d, 1H), 5.0 (bs, OH), 3.77 (m, 2H), 3.60 (d, 1H), 3.41 (t, 2H), 3.34 (d, 1H), 2.27 (s, 3H), 1.96 (m, 2H).
