Methanaminium, N-((1H-benzotriazol-1-yloxy)(dimethylamino)methylene)-N-methyl-, hexafluorophosphate(1-) (1:1) → (E)-4,4,5,5,5-Pentafluoro-N-[2-[[2-(2-methyl-1,3-dioxolan-2-yl)-4-pyridyl]amino]-ethyl]pent-2-enamide

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Reaction Steps

(E)-4,4,5,5,5-Pentafluoropent-2-enoic acid (133 mg, 0.7 mmol) and HBTU (265 mg, 0.7 mmol) were dissolved in a 2:1 mixture of anhydrous DMF and anhydrous THF (3 ml) and stirred at room temperature for 15 minutes. N-[2-(2-Methyl-1,3-dioxolan-2-yl)-4-pyridyl]ethane-1,2-diamine (100 mg, 0.45 mmol) was added and stirring was continued for 3 hours. The reaction mixture was diluted with ethyl acetate, washed with water, saturated sodium bicarbonate solution and brine, dried over magnesium sulfate and evaporated to dryness under reduced pressure. The residue was purified by preparative HPLC (gradient of water containing 0.1% NH3 and acetonitrile) to yield 47 mg (0.12 mmol, 26%).

Provenance & Evidence