Dichloromethane → HCID 86732562, compound

Participants

Reaction Steps

To a solution of tert-butyl(2-{6-iodo-1-oxo-7-[3-(trifluoromethoxy)phenyl]-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazin-4-yl}ethyl)carbamate (100 mg, 0.177 mmol) in 3 ml of 1,4-dioxane and 1 ml of water, under argon atmosphere, (67.9 mg, 0.531 mmol) of 3-thienylboronic acid, 7.2 mg (0.009 mmol) of 1,1′-bis(diphenylphosphino)ferrocenepalladium, complex with dichloromethane and 172 mg (0.531 mmol) of cesium carbonate, were subsequently added. The mixture was heated at 80° for 1 hour in a sealed vial. The reaction was filtered through a celite pad and the solvent evaporated to dryness. The crude was then portioned between ethyl acetate and water, the organic layer dried over sodium sulphate and the solvent removed in vacuo. After purification by flash chromatography on silica gel column (DCM/EtOAc/EtOH 6/4/0.5), and further purification by HPLC/MS preparative method 1, 50 mg (54%) of tert-butyl(2-{1-oxo-6-(thiophen-3-yl)-7-[3-(trifluoromethoxy)phenyl]-1,2,3,4-tetrahydropyrrolo[1,2-a]pyrazin-4-yl}ethyl)carbamate were obtained.

Provenance & Evidence