Cesium carbonate → HCID 66993602, compound

Participants

Reaction Steps

A solution of 8-benzyl-3-chloro-6,7,8,9-tetrahydropyrazino[2,3-f][1,4]oxazepine (100 mg), 2-methyl-1H-imidazole (42 mg), copper iodide (14 mg) and cesium carbonate (236 mg) in DMF (2 mL) was stirred at 100° C. overnight. The reaction mixture was filtered, water (10 mL) was added to the filtrate, and the mixture was extracted with ethyl acetate. The aqueous layer was extracted again with ethyl acetate. The combined organic layer was washed with water and saturated brine, dried over magnesium sulfate, and concentrated. The residue was purified by silica gel column chromatography (solvent gradient: 50→100% ethyl acetate/hexane) to give the title compound (18 mg, 15%) as a pale-yellow oil.

Provenance & Evidence