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. Author manuscript; available in PMC: 2008 Feb 8.
Published in final edited form as: Bioorg Med Chem. 2006 Jul 7;14(19):6525–6538. doi: 10.1016/j.bmc.2006.06.019

Scheme 1.

Scheme 1

Reagents and conditions: (a) i—K2CO3, acetone, reflux, ii—substituted phenols (5, 6, 7, 8, 21 or 22), K2CO3, methylethylketone, reflux; (b) EtOH, AcCl, 0 °C; (c) CSCl2, aq NaHCO3, CHCl3.