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. Author manuscript; available in PMC: 2013 Jul 30.
Published in final edited form as: Bioorg Med Chem. 2012 Mar 12;20(9):3009–3015. doi: 10.1016/j.bmc.2012.03.004

Scheme 4.

Scheme 4

Synthesis of tricyclic 2′-deoxyadenosine 6. Reagents and conditions: (a) CH(OEt)3, 4 Å molecular sieves; (b) (i) TPSCl, DMAP, TEA, MeCN, 3 h; (ii) NH3, 18 h, rt; (c) BF3·OEt2, EtSH, CH2Cl2.