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. Author manuscript; available in PMC: 2009 Aug 1.
Published in final edited form as: Bioorg Med Chem. 2008 Jun 20;16(15):7291–7301. doi: 10.1016/j.bmc.2008.06.030

Scheme 5a.

Scheme 5a

Alternative Synthetic Scheme for Compound 13

a Reagents and conditions: (i) CuI, ethylene glycol, K2CO3, iPrOH, 80 °C, reflux, 12 h; (ii): KI, K2CO3, DME, 4-chloro-4′-fluorobutyrophenone, reflux, 12 h.