Sodium Hydroxide → HCID 71258375, compound

Participants

Reaction Steps

rac-1-[(3R,4R)-4-methylpiperidin-3-yl]-1H-pyrrolo[2,3-h][1,6]naphthyridin-4(7H)-one hydrochloride (18 mg, 0.057 mmol) and 2,3-difluorobenzaldehyde (10 mg, 0.070 mmol) in a mixture of methanol (1 mL)/acetic acid (1 mL) was stirred with 2-picoline borane (10 mg, 0.094 mmol) at room temperature for one day. After addition of saturated aqueous sodium hydrogen carbonate and 1 M aqueous sodium hydroxide, the reaction mixture was extracted with chloroform, and the organic layer was dried over anhydrous sodium sulfate and concentrated under reduced pressure. The residue was purified by silica gel thin layer chromatography (chloroform/methanol=20/1 (v/v)) to give rac-1-[(3R,4R)-1-(2,3-difluorobenzyl)-4-methylpiperidin-3-yl]-1H-pyrrolo[2,3-h][1,6]naphthyridin-4(7H)-one (less polar fraction: 6.1 mg, yield 26%) as a pale yellow solid and rac-1-[(3R,4R)-1,4-dimethylpiperidin-3-yl]-1H-pyrrolo[2,3-h][1,6]naphthyridin-4(7H)-one (more polar fraction: 5.9 mg, yield 35%) as a colorless oil.

Provenance & Evidence