Cesium carbonate → 4-(5-Bromothiophen-2-yl)-2-(2-(2-oxoimidazolidin-1-yl)ethylamino)pyrimidine-5-carbonitrile

Participants

Reaction Conditions

Reaction Steps

2-(2-Bromothiophene-5-carbonyl)-3-(dimethylamino)acrylonitrile) (3 g, 10 mmol) in N-methylpyrrolidone (15 mL) was treated with 1-(2-(2-oxoimidazolidin-1-yl)ethyl)guanidine hydrochloride (1 M solution in N-methylpyrrolidone, 15 mL, 15 mmol) and cesium carbonate (3.4 g, 10 mmol). The mixture was heated at 100° C. overnight. The reaction was then allowed to cool to room temperature and poured onto crushed ice. The resulting solid that formed was suspended in hot methanol to give a yellow solid (2.3 g). The filtrate was concentrated and purified by flash chromatography using a gradient of 3 to 10% methanol in dichloromethane to obtain an additional 0.9 g of the desired product. Total yield=3.2 g. MS (M+H)+ 394.

Provenance & Evidence