Formamidine acetate → (2R)-2-[9-(5-Cyclopropyl-1H-pyrazol-3-yl)-6-methyl-9H-purin-2-ylamino]-2-(4-fluorophenyl)ethanol

Participants

Reaction Steps

A mixture of (R)-2-[5-amino-4-(5-cyclopropyl-1H-pyrazol-3-ylamino)-6-methylpyrimidin-2-ylamino]-2-(4-fluorophenyl)ethanol (Method 40; 0.3 g, 0.8 mmol) and formamidine acetate (0.2 g, 1.6 mmol) in EtOH (8 ml) was heated to reflux for 12 hours. The reaction was then concentrated, dissolved in DCM (50 ml), and washed with saturated NaHCO3 solution (50 ml). The organic layer was then dried, filtered, and concentrated. The resulting solid was purified by column chromatography (DCM:MeOH=20:1) to give the title compound (0.11 g, 35%). NMR (400 MHz, CD3OD) 8.32 (s, 1H), 7.46-7.43 (m, 2H), 7.06-7.02 (m, 2H), 6.24 (s, 1H), 5.10-5.02 (m, 1H), 3.87-3.75 (m, 2H), 2.61 (s, 3H), 1.99-1.96 (m, 1H), 1.10-1.08 (m, 2H), 0.80-0.75 (m, 2H). MS: Calcd.: 393; Found: [M+H]+ 394.

Provenance & Evidence