NOVELTY - Preparing N-(substituted phenyl)-1,7,7-trimethylbicyclo(2.2.1)heptan-2-amine i.e. N-(3,5-dimethylphenyl)-1,7,7-trimethylbicyclo(2.2.1)heptan-2-amine (I), comprises e.g. (i) adding an organic solvent A, 3,5-dimethylaniline, camphor and a catalyst B into a reaction vessel, (ii) placing the reaction vessel in a microwave reactor, and reacting for 10-30 minutes, (iii) adding sodium borohydride, and again carrying out microwave reaction, (iv) repeating the steps (ii) and (iii), and stopping the reaction when there is no reduction in raw material, and (v) removing the solvent, and extracting.    USE - The method is useful for preparing N-(substituted phenyl)-1,7,7-trimethylbicyclo(2.2.1)heptan-2-amine i.e. N-(3,5-dimethylphenyl)-1,7,7-trimethylbicyclo(2.2.1)heptan-2-amine (claimed).    ADVANTAGE - The method: utilizes cheap and easily available catalyst, and reduces intermediate reaction steps; has short reaction time, high product yield, and low cost; and is environment-friendly.    DETAILED DESCRIPTION - Preparing N-(substituted phenyl)-1,7,7-trimethylbicyclo(2.2.1)heptan-2-amine i.e. N-(3,5-dimethylphenyl)-1,7,7-trimethylbicyclo(2.2.1)heptan-2-amine of formula (I), comprises (i) adding an organic solvent A, 3,5-dimethylaniline and camphor into a reaction vessel, and adding a catalyst B under stirring condition, (ii) placing the reaction vessel in a microwave reactor equipped with an air condenser and a reflux condenser, adjusting microwave power to 240-640 W, and reacting for 10-30 minutes, (iii) stopping the reaction, cooling, adding sodium borohydride and stirring for 20-40 minutes, then again adjusting the microwave power, and continuing the reaction, (iv) repeating the steps (ii) and (iii), monitoring the reaction by thin layer chromatography, and stopping the reaction when there is no reduction in raw material, and (v) removing the solvent from the obtained reacted solution under vacuum, adding water under low temperature, stirring for 1-2 hours, then adding an organic solvent C, mixing, extracting, removing solvent to obtain organic layer, and then isolating by column chromatography to obtain final product.