3189-13-7

A method for preparing quinoline and indole derivatives by catalytic oxidation and dehydrogenation of nitrogen-containing heterocyclic compounds using bio-based carbon materials, comprising the following steps:
S1. Using straw as raw material, mixing it with a dehydrating agent (e.g., P2O5, polyphosphoric acid, etc.) at a mass ratio of 1:1 to 1:8, placing it in a hydrothermal reactor with a polytetrafluoroethylene liner, reacting at 150℃-200℃ for 1-8 hours, removing it, washing it with deionized water until neutral, obtaining the catalyst;
S2. Adding 0.5 mmol of 6-methoxy-indoline and 50 mg of catalyst to a reaction tube, using oxygen as the oxidant, Using H2O as solvent, and controlling the temperature at 110℃, the reaction was carried out for 24 hours to obtain the corresponding product, 6-methoxyindole, in 83% yield.