Cesium carbonate → 9-bromo-2-(4-isopropyl-4H-[1,2,4]triazol-3-yl)-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene

Participants

Reaction Conditions

Reaction Steps

To a microwave vial were charged 9-bromo-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene (200 mg, 0.755 mmol), 4-isopropyl-3-methanesulfonyl-4H-[1,2,4]triazole (143 mg, 0.755 mmol), cesium carbonate (246 mg, 0.755 mmol) and THF (2 mL). The reaction mixture was heated to 150° C. for 2 h then extracted with ethyl acetate (20 mL), washed with water (20 mL), dried (Na2SO4), filtered and concentrated in vacuo. The resultant residue was subjected to flash chromatography (SiO2, gradient 0 to 100% ethyl acetate in cyclohexane) to afford 9-bromo-2-(4-isopropyl-4H-[1,2,4]triazol-3-yl)-4,5-dihydro-2H-6-oxa-1,2-diaza-benzo[e]azulene (122 mg, 43%). LCMS RT=4.34 min, M+H+=374/376.

Provenance & Evidence