▎ 摘　　要

NOVELTY - Method for preparing graphene-loaded ferric chloride catalyst involves dissolving graphene oxide powder and ferric chloride in ethanol, stirring solution for 30 minutes, adding ammonium nitrate and ammonium dihydrogen phosphate, stirring solution for 30 minutes, heating and reacting solution for 30 minutes, evaporating ethanol, calcining product in calciner for 2-3 hours, cooling calcined product to room temperature, washing product using ethanol and purified water, drying product at 90 degrees C, and crushing dried product into powder having particle size of 10 mu m or less. USE - The method is useful for preparing graphene-loaded ferric chloride catalyst, which is used for producing 3-(2-chloropyrimidin-4-yl)-1-methylindole (all claimed). ADVANTAGE - The method is cost-effective. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is included for use of graphene-loaded ferric chloride catalyst for producing 3-(2-chloropyrimidin-4-yl)-1-methylindole by catalyzing reaction of 1-methyl-1H-indole with 2,4-dichloropyrimidine.