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. Author manuscript; available in PMC: 2012 Sep 1.
Published in final edited form as: Steroids. 2011 Apr 4;76(10-11):986–990. doi: 10.1016/j.steroids.2011.03.008

Scheme 2.

Scheme 2

i) Jones reagent, acetone; j) 1. Pyridinium tribromide, acetic acid, 2. LiCl, DMF, 100 °C, 4 h; k) Li, NH3, THF, t-BuOH, allyl iodide, −78 °C, 2.5h; l) K-selectride, THF, −78 °C, 2 h.