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. Author manuscript; available in PMC: 2013 Dec 1.
Published in final edited form as: Bioorg Med Chem. 2012 Sep 23;20(23):6885–6893. doi: 10.1016/j.bmc.2012.09.026

Scheme 5.

Scheme 5

Glycosylation of 15 with 6-chloropurine. Reagents and conditions: (a) 1 equiv 15, 4 equiv 6-chloropurine, 6 equiv BSA, MeCN, 80 °C, 1 h; (b) 2.7 equiv TMSOTf, 0–80 °C, 30 min; (c) 1.5 equiv TBAF, THF, r.t., 1 h.