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. Author manuscript; available in PMC: 2008 Jul 1.
Published in final edited form as: Bioorg Med Chem Lett. 2007 Apr 25;17(13):3581–3584. doi: 10.1016/j.bmcl.2007.04.062

Scheme 1.

Scheme 1

Reagents and conditions: (a) Pd(PPh3)4, CuI, Et3N, CH3CN, 0 ºC to rt; (b) (Bu3Sn)2, Pd(PPh3)4, toluene, 110 ºC; (c) I2, THF, 0 ºC to rt; (d). H2O2, Na125I, HCl, EtOH; (e). PPTS, EtOH, 55 ºC, 3 h.