Chloride → 2-[(E)-2-(5,8-Dimethyl-[1,2,4]triazolo[1,5-a]pyrazin-2-yl)-vinyl]-quinoline-6-carbonitrile

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Reaction Steps

To a suspension of (5,8-Dimethyl-[1,2,4]triazolo[1,5-a]pyrazin-2-ylmethyl)-triphenyl-phosphonium; chloride (0.222 g, 0.483 mmol) and 2-Formyl-quinoline-6-carbonitrile (80 mg, 0.4 mmol) in dry Tetrahydrofuran (6 mL, 80 mmol) was added 1,8-Diazabicyclo[5.4.0]undec-7-ene (66 uL, 0.44 mmol) (reaction mixture turns slightly yellow for a while and precipitation changes character) and the mixture was stirred at room temperature under an atmosphere of Argon overnight. The mixture was rotovaped and the THF was evaporated off. The solid was dissolved in DCM and was chromatographed on silicagel (0-30% MeOH in EtOAc). Pure product 2-[(E)-2-(5,8-Dimethyl-[1,2,4]triazolo[1,5-a]pyrazin-2-yl)-vinyl]-quinoline-6-carbonitrile precipitates in one of the fractions (10): isolated by filtration. Yield: 6 mg white solid.

Provenance & Evidence