Selectfluor → 4-Chloro-5-fluoro-7H-pyrrolo(2,3-d)pyrimidine

Beteiligte Stoffe

Reaktionsschritte

To a solution of the compound from Step B (1.97 g, 6.20 mmol) in CH3CN (60 mL) was added [1-(chloromethyl)-4-fluoro-1,4-diazoniabicyclo[2.2.2]octane bis(tetrafluoroborate)] (SELECTFLUOR® fluorinating reagent) (2.40 g, 6.5 mmol) in one portion and the reaction mixture was stirred at room temperature for 7 h. The white precipitate was filtered off, and the filtrate was evaporated to dryness. The residue was purified over silica gel using ethyl acetate/hexane (3:7) as the eluent. Fractions containing the product were pooled and eveporated in vacuo to give the title compound as a colorless solid.

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