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. Author manuscript; available in PMC: 2014 Jan 15.
Published in final edited form as: Bioorg Med Chem Lett. 2012 Dec 1;23(2):412–416. doi: 10.1016/j.bmcl.2012.11.092

Scheme 2.

Scheme 2

Reagents and conditions: (a) K2CO3, MeCN, rt, overnight; (b) TMS-CF3, CsF, THF, rt, overnight; (c) 2, PdCl2(dppf)•DCM, Cs2CO3, THF/H2O, 160 °C, 10 min.