Nitrogen → HCID 22720608, compound

Participants

Reaction Steps

(Chart A, Step 2): A solution of ethyl 4-(2-methoxy-6-nitrophenyl)-3-oxobutanoate (10.6 g, 37.5 mmol) in MeOH (350 mL) is purged with N2, and treated with 10% Pd/C (1.10 g) turning the yellow solution black. The suspension is treated with ammonium formate (27.4 g, 43.5 mmol) with a slight exotherm and evolution of H2. After 15 minutes, the reaction mixture is filtered through a pad of celite, and concentrated. The residue is diluted with water and extracted 3 times with ethyl acetate. The combined organics are washed with brine, dried over NaSO4, filtered, and concentrated to give 9.4 g of crude material which is combined with the crude material from a previous 1.5 mmol reaction. The crude material is purified by LC (25% ethyl acetate/heptane) to give 8.08 g of substituting ethyl 2-(4-methoxy-1H-indol-2-yl)acetate as an oil that solidifies overnight. IR (liq.) 3389, 1730, 1617, 1594, 1510, 1438, 1367, 1287, 1250, 1217, 1167, 1151, 1097, 1030, 767 cm−1.

Provenance & Evidence