Trifluoroacetic acid → HCID 118598585, compound

Participants

Reaction Steps

8-Chloro-6-[[7-(2-trimethylsilylethoxy)purin-6-yl]amino]spiro[2H-imidazo[1,5-a]pyridine-3,1′-cyclohexane]-1,5-dione (5, 0.6 g, 1.2 mmol) was dissolved in dichloromethane (10 mL) in a flask and trifluoroacetic acid (1.36 g, 11.95 mmol) was added dropwise and stirred the mixture at room temperature overnight. After completion, evaporated the solvent under reduced pressure and the crude was basified by saturated aqueous solution of sodium bicarbonate to pH 8 and extracted with dichloromethane (2×50 mL). The organic layer was dried over any. Sodium sulfate and concentrated to afford crude. The crude was purified by flash column chromatography eluting with 2.5% methanol in dichloromethane. The desired fractions were concentrated to dryness under vacuum to afford 8-chloro-6-(7H-purin-6-ylamino)spiro[2H-imidazo[1,5-a]pyridine-3,1′-cyclohexane]-1,5-dione (Cpd. No. 117) as a yellow solid. Yield: 0.06 g, 13%; MS (ESI) m/z 386.39 [M+1]+; 1H NMR: (400 MHz, DMSO-d6) δ 10.43 (m, 1H), 10.37 (s, 1H), 8.88 (s, 1H), 8.64 (s, 1H), 8.43 (s, 1H), 2.94 (t, J=2.32 Hz, 2H), 1.77 (m, 2H), 1.63 (m, 3H), 1.57 (d, J=12.8 Hz, 2H), 1.23 (m, 1H).

Provenance & Evidence