aluminum oxide T=420°C;

acetic acid; zinc in ethyl acetate T=25 - 35°C; 9 h; Product distribution / selectivity;

1: formic acid, tert-butylcatechol / ethanol / 120 h / Heating 2: KOH / Heating View Scheme

dipotassium peroxodisulfate; ethanol T=220°C;

1.1: potassium carbonate / tert-butyl alcohol / 1.17 h / |Reflux 1.2: 11 h / |Reflux 2.1: thionyl chloride / chloroform / 1 h / |Reflux 3.1: acetic acid; piperidine / toluene / |Heating 4.1: hydrogen / tetrahydrofuran / 12 h 5.1: zinc; acetic acid / 15 h / 25 - 30 °C View Scheme

acetic acid; zinc in methanol Industry scale; Product distribution / selectivity;

1: 0.5 h / 120 °C 2: sodium hydroxide / water / 2 h / 40 °C 3: thionyl chloride; triethylamine / dichloromethane / 1.25 h / 0 - 5 °C 4: N,N-dimethyl-formamide / 14 h / 80 °C 5: thionyl chloride / chloroform / 1 h / |Reflux 6: acetic acid; piperidine / toluene / |Heating 7: hydrogen / tetrahydrofuran / 12 h 8: zinc; acetic acid / 15 h / 25 - 30 °C View Scheme

1: thionyl chloride / chloroform / 1 h / |Reflux 2: acetic acid; piperidine / toluene / |Heating 3: hydrogen / tetrahydrofuran / 12 h 4: zinc; acetic acid / 15 h / 25 - 30 °C View Scheme

1: thionyl chloride / chloroform / 2 h / |Reflux 2: zinc; acetic acid / 15 h / 25 - 30 °C View Scheme

potassium hydroxide