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. Author manuscript; available in PMC: 2014 Jun 24.
Published in final edited form as: Tetrahedron. 2013 Apr 15;69(25):5205–5220. doi: 10.1016/j.tet.2013.04.041

Scheme 26.

Scheme 26

Elaboration to hydrazone 101. Reagents and conditions: a) Dess-Martin periodinane, NaHCO3, CH2Cl2, 0 °C to rt, 64%; b) H2NNHTs, MeOH, 40 °C, 43%.