Cesium carbonate → HCID 11661053, compound

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Reaction Steps

A solution of 2-Fluoro-8-(6-chloro-benzo[1,3]dioxol-5-ylmethyl)adenine (11 mg, 0.034 mmol), Cs2CO3 (11 mg, 0.034 mmol) and pent-4-ynyl tosylate (10.5 mg, 0.044 mmol) in anhydrous DMF (85 L) was stirred at 50° C. for 1 h. Following solvent removal, the product (4.2 mg, 31.9%) was collected through silica gel column purification (EtOAc:hexanes:CHCl3:i-PrOH at 10:20:20:1). 1H NMR (400 MHz, CDCl3) 6.89 (s, 1H), 6.61 (s, 1H), 5.98 (bs, 2H), 5.96 (s, 2H), 4.27 (s, 2H), 4.13 (t, J=7.5 Hz, 2H), 2.24-2.10 (m, 2H), 2.00-1.91 (m, 3H); 13C NMR (100 MHz, CDCl3) 1597, 158.0, 156.3, 150.6, 147.7, 147.2, 126.2, 125.3, 110.0, 102.0, 82.3, 69.9, 42.2, 31.4, 28.1, 15.8; MS m/z 388.1 (M+H)+. HPLC: (a) 98.1% (65% water-35% acetonitrile); (b) 97.0% (35% to 45% acetonitrile).

Provenance & Evidence