1: pyridine / 16 h / Ambient temperature 2: 1.) acetyl bromide, 30 percent hydrobromide / 1.) AcOH, 20 min, r.t.; 2.) toluene, xylene, reflux, 30 min 3: 94 percent / NaOMe / methanol / 1 h / Heating View Scheme

sulfuric acid

in pyridine 16 h; Ambient temperature;