pyridine 0.75 h; Heating;

1: 80 percent / benzene / 72 h / Ambient temperature 2: 95 mg / p-toluenesulfonic acid / benzene / 5 h / Heating 3: 100 percent / thionyl chloride / 1.5 h / Heating 4: 96 percent / pyridine / 0.75 h / Heating View Scheme

1: 95 mg / p-toluenesulfonic acid / benzene / 5 h / Heating 2: 100 percent / thionyl chloride / 1.5 h / Heating 3: 96 percent / pyridine / 0.75 h / Heating View Scheme

potassium carbonate; lithium bromide in tetrahydrofuran 6 h; Yield given. Yields of byproduct given. Title compound not separated from byproducts;

1: 100 percent / thionyl chloride / 1.5 h / Heating 2: 96 percent / pyridine / 0.75 h / Heating View Scheme

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