Trifluoroacetic acid → HCID 66672664, compound

Participants

Reaction Steps

4-[(R)-8-(2,4-Difluoro-phenylamino)-2-(1,4-dioxa-spiro[4.5]dec-8-ylamino)-7H-purin-9-yl]-cyclohexanol (0.62 g, 1.7 mmol) was dissolved in 25 mL of methylene chloride under an N2 atmosphere. Trifluoroacetic acid (5 mL) was then added dropwise via addition funnel. After stirring for 24 h the resulting reaction mixture was concentrated under reduced pressure. Saturated sodioum bicarbonate was added to the resulting residue until pH 12. The basic aqueous layer was then extracted using chloroform (2×75 mL). The combined organic layers were dried with MgSO4. The crude product was then purified on the preparatory HPLC using a 5-70% CH3CN/H2O over 39 minutes method. Fractions of greater then 98% purity via analytical HPLC were combined and concentrated. Excess trifluoroacetic acid was removed by washing the product with 1.75 M potassium carbonate (3×100 mL). The organic layers were then concentrated to dryness under vacuum to give the ketone (0.015 g 0.033 mmol, 12%) as a fine white powder: LC-MS (m/z) 457.1 [M+1]+.

Provenance & Evidence