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Synthesis of phenyl-, methoxyphenyl-, and pyridyl B-ring-containing analogs. Reagents and conditions: a) 4-methylimidazole, K2CO3, DMSO, 55 °C, 16 h, 44–67%; b) Br2, 33% HBr in AcOH, DCM, r.t., 1.5 h, 75–80%; c) NaOMe, DMF, 0 °C to 50 °C, 1 h, 27%; d) Br2, 33% HBr in AcOH, r.t., 0.75 h, 100%.
