Formaldehyde → HCID 18998700, compound

Participants

Reaction Steps

[step 2] 2-(2-Ethyl-5,7-dimethyl-3H-imidazo[4,5-b]pyridin-3-yl)methyl-10,11-dihydro-5H-dibenzo[b,f]azepine (55.4 g, 145 mmol) obtained in step 1 was dissolved in acetic acid (500 mL) and the solution was added with potassium cyanide (11 g, 169 mmol) and paraformaldehyde (4.6 g, 152 mmol) at 10° C., followed by stirring at room temperature for 24 hr. The mixture was added to a mixed solution of 10 mol/L aqueous sodium hydroxide solution (900 mL), ice (1 L) and dichloromethane (1 L). The organic layer was washed with 0.1 mol/L aqueous sodium hydroxide solution and brine, dried over anhydrous magnesium sulfate, and concentrated under reduced pressure. The residue was purified by silica gel column chromatography (hexane/ethyl acetate/triethylamine=10/10/1) to give 5-cyanomethyl-2-(2-ethyl-5,7-dimethyl-3H-imidazo[4,5-b]pyridin-3-yl)methyl-10,11-dihydro-5H-dibenzo[b,f]azepine (39.0 g, 64%).

Provenance & Evidence