Ethanol → HCID 178469559, compound

Participants

Reaction Steps

To a solution of ethyl 2-[(3,4-difluorophenyl)amino]-4-oxo-4,5-dihydrofuran-3-carboxylate (0.084 g, 0.30 mmol) which similarly prepared according to the procedure described in the Example 4, First step and 7-azaindole-3-carboxaldehyde (0.041 g, 0.28 mmol) in 2-propanol (2.0 mL), 2M hydrochloric acid in ethanol (0.14 mL, 0.28 mmol) was added at ambient temperature. The mixture was refluxed for 18 h. Cooled with ice bath, aqueous 2M sodium hydroxide solution (0.13 mL, 0.26 mmol) was added dropwise to neutralize, ethanol (5.0 mL) was added and the mixture was refluxed for 1.5 h. The precipitate was collected by filtration, washed with hot ethanol. The solid was washed with hexane then dried to afford the titled compound as solid (0.051 g, y. 44%).

Provenance & Evidence