Cesium carbonate → HCID 11627094, compound

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Reaction Steps

A solution of 2-Fluoro-8-(6-iodo-benzo[1,3]dioxol-5-ylmethyl)adenine (6 mg, 0.0145 mmol), Cs2CO3 (5 mg, 0.0145 mmol) and pent-4-ynyl tosylate (4.5 mg, 0.189 mmol) in anhydrous DMF (200 L) was stirred at 60° C. for 1.5 h. Following solvent removal, product (5.9 mg, 84.9%) was collected through silica gel column purification (EtOAc:hexanes:CHCl3:i-PrOH at 10:20:20:1). 1H NMR (400 MHz, CDCl3) 7.29 (s, 1H), 6.59 (s, 1H), 5.94 (s, 2H), 5.83 (bs, 2H), 4.26 (s, 2H), 4.11 (t, J=7.4 Hz, 2H), 2.26-2.19 (m, 2H), 2.00 (t, J=2.5 Hz, 1H), 1.98-1.94 (m, 2H); 13C NMR (100 MHz, CDCl3) 150.9, 148.9, 147.8, 131.5, 118.8, 109.4, 101.9, 88.1, 82.3, 69.9, 42.3, 39.2, 28.2, 15.9; MS m/z 480.0 (M+H)+. HPLC: (a) 95.5% (60% water-40% acetonitrile); (b) 95.0% (35% to 55% acetonitrile).

Provenance & Evidence