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. Author manuscript; available in PMC: 2011 Jun 26.
Published in final edited form as: Tetrahedron. 2010 Jun 26;66(26):4745–4759. doi: 10.1016/j.tet.2010.03.093

Scheme 11a.

Scheme 11a

aConditions: (a) m-CPBA, NaHCO3, CH2Cl2, 0 °C, 2 h (dr 5:1, 77% α, 15% β). (b) 0.1% HCl in CHCl3, 20 °C, 12 h, 96% recovery