(2.5 g) was dissolved in THF (50 mL) and added to an addition funnel. This solution was added dropwise to the Cs2CO3 solution over the course of 20 minutes at a rate of 1 drop per second. The reaction was allowed to stir overnight at room temperature with progress monitored by TLC (1:2 hexanes:CH2Cl2, Rf(cyanostar) = 0.4). Upon completion, the reaction was concentrated under reduced pressure. The resulting yellow oil was dissolved in methanol, and the precipitate was removed by filtration. The filtrate was collected, concentrated under reduced pressure, and the residue subjected to flash chromatography. A slow solvent gradient of up to 60% CH2Cl2 in hexane increased over five column volumes. Eluent composition of 60% CH2Cl2 in hexane was then held for 10 additional column volumes to yield cyanostar as a white powder (0.262 g, 11%).