1-Ethyl-3-(3'-dimethylaminopropyl)carbodiimide → 5-{(1E)-3-Oxo-3-[3-(pyridin-4-ylmethoxy)azetidin-1-yl]prop-1-en-1-yl}pyridin-2-amine

Participants

Reaction Steps

To a solution of (2E)-3-(6-aminopyridin-3-yl)acrylic acid hydrochloride (42 mg, 0.21 mmol; which may be prepared as described in Step 2) in DMF (5 mL) were added 4-[(azetidin-3-yloxy)methyl]pyridine dihydrochloride (50 mg, 0.25 mmol; which may be prepared as described in Step 4), DIPEA (171 μL, 1.04 mmol), DMAP (2.5 mg, 0.02 mmol) and EDAC (48 mg, 0.25 mmol). The reaction mixture was stirred at room temperature overnight and concentrated to dryness. The residue was partitioned between a NaHCO3 5% solution and DCM. The aqueous phase was extracted twice with DCM, dried over sodium sulfate, filtered and concentrated under vacuum to give an orange solid. The crude was purified on preparative TLC (eluent: 90/10 DCM/MeOH+1% NH4OH) to give the title compound (21 mg, 33%) as a pale yellow solid.

Provenance & Evidence