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. Author manuscript; available in PMC: 2012 Dec 15.
Published in final edited form as: Bioorg Med Chem Lett. 2011 Oct 13;21(24):7426–7430. doi: 10.1016/j.bmcl.2011.10.011

Scheme 1.

Scheme 1

Reagents and conditions: (a) NaH, DMF, THF; (b) BH3-THF; EtOH, H2O2, NaOH (aq); (c) MsCl, Et3N, CH2Cl2; (d) KSAc, DMF; (e) HBr, PhOH, HOAc, CH2Cl2; (f) K2CO3 (aq); (g) HCl (aq), 2-mercaptoethanol, EtOH; recrystallize.