Lawesson's reagent → (E)-4,4,4-Trifluoro-1-[4-(4-methyl-2-pyridyl)piperazin-1-yl]but-2-ene-1-thione

Participants

Reaction Conditions

Reaction Steps

The residue of step A was dissolved in anhydrous THF (2 ml), Lawesson's reagent (40 mg, 0.2 mmol) was added and the mixture was stirred at 110° C. in closed vial under microwave heating. The mixture was concentrated under reduced pressure and the residue was purified by preparative HPLC (Waters X-Bridge, gradient of water containing 0.1% NH3 and acetonitrile) to yield 12 mg of a solid (0.039 mmol, yield 20% for two steps).

Provenance & Evidence