Cesium carbonate → HCID 89761890, compound

Participants

Reaction Conditions

Reaction Steps

To a solution of INTERMEDIate M (300 mg, 0.717 mmol) and 1-fluoro-2-(methylsulfonyl)benzene (149.0 mg, 0.861 mmol, Apollo) in DMF was added cesium carbonate (467.0 mg, 1.43 mmol). The reaction mixture was heated at 90° C. for 16 h. After completion, the reaction mixture was diluted with water (10 mL) and extracted with ethyl acetate (2×10 mL). The organic layer was dried over sodium sulfate and concentrated under reduced pressure to obtain the crude material which was purified by combiflash column chromatography (column size: 12 g; elution: 12% ethyl acetate in hexane) to provide N-(4-methoxybenzyl)-4-(2-(methylsulfonyl)phenyl)-N-(thiazol-2-yl)-3,4-dihydro-2H-benzo[b][1,4]oxazine-7-sulfonamide (200 mg, 48.8%) as yellow solid. MS (ESI, positive ion) m/z: 572.02 (M+1).

Provenance & Evidence