Cesium carbonate → HCID 90405153, compound

Participants

Reaction Steps

3-(4-(1-(4-(Trifluoromethoxy)phenyl)-1H-1,2,4-triazol-3-yl)phenyl)propanoyl azide (C34) (0.24 g, 0.59 mmol) in acetonitrile (2.9 mL) was heated at 80° C. for 2 hours. The reaction was cooled and cesium carbonate (0.29 g, 0.88 mmol) and 1-(2-isopropylphenyl)thiourea (0.14 g, 0.70 mmol) were added. The reaction was stirred at room temperature overnight. LC/MS showed formation of the thiobiuret was complete. The reaction mixture was diluted with ethanol (2.9 mL) and sodium acetate (0.19 g, 2.4 mmol) and methyl 2-bromoacetate (0.12 mL, 1.2 mmol) were added. The solution was heated at 65° C. for 2 hours. The reaction was diluted with ethyl acetate and washed with water. The organic layer was dried over anhydrous sodium sulfate, filtered, concentrated, and loaded onto a Celite® cartridge with dichloromethane. Purification by flash column chromatography using 0-100% ethyl acetate/B, where B=1:1 dichloromethane/hexanes, as eluent afforded the title compound as a tan oil (0.22 g, 62%).

Provenance & Evidence