Cesium carbonate → 7-(4-chlorobenzyl)-1-(2-hydroxyethyl)-3-methyl-8-(3-(trifluoromethyl)phenoxy)-1H-purine-2,6(3H,7H)-dione

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Reaction Steps

To a solution of 7-(4-chlorobenzyl)-3-methyl-8-(3-(trifluoromethyl)phenoxy)-1H-purine-2,6(3H,7H)-dione (60 mg, 0.133 mmol, example 1) in DMF (1 mL) was added 2-bromoethanol (16.5 mg, 0.133 mmol) and cesium carbonate (86.6 mg, 0.266 mmol). The resulting mixture was subjected to microwave irradiation at 120 for 20 min in a sealed tube. The mixture was diluted with ethyl acetate (5 mL) and extracted with saturated aqueous ammonium chloride solution. The organic phase was dried and concentrated to give crude product which was purified preparative HPLC to give 7-(4-chlorobenzyl)-1-(2-hydroxyethyl)-3-methyl-8-(3-(trifluoromethyl)phenoxy)-1H-purine-2,6(3H,7H)-dione (19 mg, 28.8% yield) as white solid.

Provenance & Evidence