Tert-butyl 4-[(3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate → HCID 178452294, compound

Participants

Reaction Conditions

Reaction Steps

A solution of tert-butyl 4-[(3-oxo-2,3-dihydrobenzofuran-7-yl)methyl]piperazine-1-carboxylate (0.0442 g, 0.133 mmol) synthesized in Example B45, Step 3 in methanol (3 mL) was added with 1H-pyrazolo[3,4-b]pyridine-3-carboxaldehyde (0.0206 g, 0.140 mmol) and piperidine (7 drops), and the mixture was stirred at 60° 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-pyrazolo[3,4-b]pyridin-3-yl)methylene]-3-oxo-2,3-dihydrobenzofuran-7-yl}methyl)piperazine-1-carboxylate (0.0292 g, 48%).

Provenance & Evidence