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. Author manuscript; available in PMC: 2011 Sep 2.
Published in final edited form as: Bioorg Med Chem Lett. 2010 Mar 30;20(10):3112–3115. doi: 10.1016/j.bmcl.2010.03.093

Scheme 4.

Scheme 4

Reagents and conditions: (a) t-BuLi, THF, 0 °C; (b) 0.1 M HCl, THF, rt; (c) LiAlH4, THF, 40 °C; (d) 30% H2O2, (CF3CO)2O, rt, 67%; (e) DIBAL-H, CH2Cl2, −68 °C; (f) Al2O3, 250 °C, 37% (two steps).