Ethyl 5-hydroxy-1H-indole-2-carboxylate → HCID 57756359, compound

Participants

Reaction Conditions

Reaction Steps

A mixture of 4-chloro-6,7-dimethoxy-quinoline (0.4 g, 1.8 mmol), 5-hydroxy-1H-indole-2-carboxylic acid ethyl ester (0.37 g, 1.8 mmol, Biosynth AG) and DMAP (0.22 g, 1.8 mmol, Aldrich) in toluene (in a microwave tube) was heated in a microwave (Personal Chemistry, Emrys Optimizer) at 180° C. for 2 h. The mixture was cooled to RT and diluted with 30 mL of EtOAc. The solution was washed with 10 mL of brine twice, dried over Na2SO4 and concentrated in vacuo. The residue was further purified with silica gel column chromatography (50% to 100% EtOAc in hexanes) to provide a white foam as the desired compound. MS (ESI pos. ion) m/z: 393 (M+H). Calc'd Exact Mass for C22H20N2O5: 392.40.

Provenance & Evidence