[NH2:1][C@@H:2]1[CH2:6][C@H:5]([CH2:7][OH:8])[C@@H:4]([OH:9])[C@H:3]1[OH:10].Cl.N[C:13]1[N:18]=[C:17](Cl)[CH:16]=[C:15]([Cl:20])[N:14]=1.CCN(CC)CC>C(O)(C)C>[Cl:20][C:15]1[N:14]=[CH:13][N:18]=[C:17]([NH:1][C@@H:2]2[CH2:6][C@H:5]([CH2:7][OH:8])[C@@H:4]([OH:9])[C@H:3]2[OH:10])[CH:16]=1
To a solution of (1R,2S,3R,5R)-3-amino-5-(hydroxymethyl)cyclopentane-1,2-diol.HCl (1.00 g, 5.44 mmol) and 2-amino-4,6-dichloropyrimidine (0.982 g, 5.99 mmol) in isopropyl alcohol (8 mL) was added Et3N (1.90 mL, 116 mmol). The reaction was heated to 90° C. for 1 h in an oil bath then cooled, filtered and concentrated in vacuo. The residue was dissolved in CH2Cl2 and purified by flash chromatography (20 to 50% MeOH/CH2Cl2) to afford the title compound as an off-white solid (2.025 g, >99%). LC/MS: Rt=0.81 min ES+ 260 (FA standard).
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