Diisopropylethylamine → Tert-butyl 4-({1-[(6-methylpyridin-3-yl)carbonyl]azetidin-3-yl]carbonyl)-1,4-diazepane-1-carboxylate

Participants

Reaction Steps

To a stirred solution of tert-butyl 4-(azetidin-3-ylcarbonyl)-1,4-diazepane-1-carboxylate (1.02 g, 3.6 mmol) and DIPEA (1.41 g, 10.8 mmol) in DCM (20 mL) was added a solution of 6-methylpyridine-3-carbonyl chloride (420 mg, 4.32 mmol) in DCM (5 mL) at 0° C. After 3 hours the reaction was diluted with DCM (10 mL), washed with saturated aqueous NaHCO3 (10 mL), brine (5 mL), dried (MgSO4), filtered and concentrated at reduced pressure. Purification by silica FCC (eluting with 100:0:0 to 95:4.5:0.5 gradient of DCM/MeOH/NH3) gave the title compound (527 mg, 36%) as an orange-brown oil.

Provenance & Evidence