6-Chloro-1H-pyrrolo[2,3-b]pyridine-3-carbaldehyde → HCID 86681993, compound

Participants

Reaction Conditions

Reaction Steps

A solution of tert-butyl 4-[(6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.020 g, 0.057 mmol) obtained in Example A16, Step 1 in methanol (2.0 mL) was added with 6-chloro-1H-pyrrolo[2,3-b]pyridine-3-carboxaldehyde (0.009 g, 0.057 mmol). Then, the mixture was added with 5 drops of piperidine, and the mixture was stirred at 60° C. for 1 hour. The solvent was evaporated under reduced pressure, and then the residue was subjected to silica gel column chromatography (eluted with chloroform/methanol (95:5→90:10)) to obtain tert-butyl (Z)-4-({2-[(6-chloro-1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-6-hydroxy-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.020 g, 69%).

Provenance & Evidence