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. Author manuscript; available in PMC: 2012 Feb 9.
Published in final edited form as: Bioorg Med Chem Lett. 2009 Oct 22;19(24):6898–6901. doi: 10.1016/j.bmcl.2009.10.079

Scheme 4.

Scheme 4

Oxidative-Reductive Rearrangement Sequence.

a. PCC, silica gel, CH2Cl2. b. TsNHNH2, EtOH, HOAc. c.1. catecholborane, CHCl3, 0 °C. 2. NaOAc-3H2O, reflux.