1H-Pyrrolo[2,3-b]pyridine-3-carbaldehyde → tert-butyl (Z)-4-({2-[(1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate

Participants

Reaction Conditions

Reaction Steps

A solution of tert-butyl 4-[(3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.0251 g, 0.0755 mmol) obtained in Example A56, Step 3 in methanol (2 mL) was added with 7-azaindole-3-carboxaldehyde (0.0116 g, 0.0793 mmol) and piperidine (5 drops), and the mixture was stirred at 50° C. for 2 hours. The reaction mixture was concentrated, and the resulting residue was purified by silica gel column chromatography (chloroform/methanol) to obtain tert-butyl (Z)-4-({2-[(1H-pyrrolo[2,3-b]pyridin-3-yl)methylene]-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.0269 g, 77%).

Provenance & Evidence