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Reagents and conditions (yields): (A) Ac2O, pyridine, rt (96%); (B) 33% HBr in AcOH, AcOH/Ac2O, 0°C, rt; (C) C6Cl5ONa, acetone, reflux (58% from 2); (D) Amberlite IRA400 (OH), MeOH, 55°C, then BzCl, pyridine, 65°C (40%); (E) Br2, CCl4, hυ, reflux (78%); (F) Bu3SnH, AIBN, toluene, reflux (88%); (G) NaOMe, MeOH, reflux, then Ac2O, H2SO4, 0°C (60%); (H) NaOMe, MeOH, rt (95%).
