2-Aminothiazole → tert-butyl 4-(3-(imidazo[2,1-b]thiazol-6-yl)-2-oxo-2H-pyrano[2,3-b]pyridin-7-yl)-1,4-diazepane-1-carboxylate

Participants

Reaction Steps

tert-Butyl 4-(3-(2-bromoacetyl)-2-oxo-2H-pyrano[2,3-b]pyridin-7-yl)-1,4-diazepane-1-carboxylate (132 mg, 0.28 mmol) in 5 mL of EtOH was treated with 2-aminothiazole (34.1 mg, 0.34 mmol) at room temperature. The solution was refluxed for 16 hours and concentrated under vacuum. The residue was purified on silica gel to provide tert-butyl 4-(3-(imidazo[2,1-b]thiazol-6-yl)-2-oxo-2H-pyrano[2,3-b]pyridin-7-yl)-1,4-diazepane-1-carboxylate (64.3 mg, 49%). MS m/z 468 [M+H]+.

Provenance & Evidence