Triethylamine → (7-Chlorothieno[3,2-b]pyridin-2-yl)(4-methylpiperazin-1-yl)methanone

Participants

Reaction Steps

1-Methylpiperazine (0.574 mL, 5.17 mmol) was added to a suspension of 7-chlorothieno[3,2-b]pyridine-2-carbonyl chloride (435, 1 g, 4.31 mmol) and Et3N (1.80 mL, 12.93 mmol) in DCM (50 mL). The reaction mixture was stirred for 1 h at room temperature, diluted with water and a saturated aqueous solution of ammonium chloride and extracted with DCM. The organic layer was successively washed with a saturated aqueous solution of ammonium chloride and brine, dried over sodium sulfate, filtered and concentrated. The residue was purified by biotage (SNAP 25 g cartridge; MeOH/DCM: 0/100 to 10/90 over 20CV), to afford the title compound 436 (1.16 g, 3.93 mmol, 91% yield) as a yellow solid. MS (m/z): 296.2 (M+H).

Provenance & Evidence