Cesium carbonate → 1-Methyl-3-[1-oxo-3-(2-trifluoromethylphenyl)-1,2-dihydroisoquinolin-7-yl]urea

Participants

Reaction Steps

0.5 ml of a 1,4-dioxane solution contained 20.8 mg (0.05 mmol) of the 7-iodo-3-(2-trifluoromethylphenyl)-2H-isoquinolin-1-one obtained in Step A of Example 114; 2.2 mg (0.0025 mmol) of tris(dibenzylideneacetone)dipalladium; 4.2 mg (0.0075 mmol) of 9,9-dimethyl-4,5-bis(diphenylphosphino)xanthene; 22.8 mg (0.07 mmol) of cesium carbonate, and 4.44 mg (0.06 mmol) of methylurea, was stirred at 110° C. overnight. Thereafter, the reaction solution was cooled to a room temperature, and a saturated ammonium chloride aqueous solution was then added thereto. The mixture was extracted with ethyl acetate, and the extract was then dried over anhydrous sodium sulfate. The extract was concentrated, and the obtained residue was then purified by thin-layer chromatography (methylene chloride:methanol=20:1), so as to obtain 1.7 mg (9%) of 1-methyl-3-[1-oxo-3-(2-trifluoromethylphenyl)-1,2-dihydroisoquinolin-7-yl]urea in the form of a colorless solid.

Provenance & Evidence