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Following the process to be described below, Compound 1 was prepared. Namely, 10.16 g of m-phenoxytoluene, 9.82 g of N-bromosuccinimide and 0.15 g of benzoyl peroxide were weighed and added to 90 ml of carbon tetrachloride as a solvent. The resulting mixture was heated under reflux for 3 hours to conduct a reaction. The reaction mixture was allowed to cool down, the insoluble matter was filtered off, and the filtrate was then concentrated. The concentrate was purified by chromatography on a silica gel column (eluent: chloroform), whereby 10.9 g of 3-phenoxybenzyl bromide were obtained. In 20 ml of N,N-dimethylformamide, 2.79 g of N-(4-tert-butylbenzyl)methylamine and 1.67 g of sodium carbonate were mixed, to which a solution of 3.77 g of 3-phenoxybenzyl bromide in 25 ml of N,N-dimethylformamide was added dropwise under ice cooling. The temperature of the reaction mixture was allowed to rise to room temperature, at which a reaction was allowed to proceed for 12 hours. Chloroform and water were added to the reaction mixture to conduct liquid-liquid extraction. An organic layer was collected and then washed with water and a saturated aqueous solution of sodium chloride. The resulting solution was dried over anhydrous sodium sulfate and was then concentrated. The concentrate was purified by chromatography on a silica gel column (eluent:hexane:chloroform:ethyl acetate=9:1:0→0:10:0→0:0:100). Relevant fractions were concentrated, whereby 4.49 g of N-(4-tertiary-butylbenzyl)-N-methyl-3-phenoxybenzylamine (Compound 1) were obtained (yield: 87.8%). The following is its NMR data (CDCl3 δ ppm): 1.28(9H,s), 2.18(3H,s), 3.476(2H,s), 3.483(2H,s), 6.86-7.35(13H,m).

1. customwas prepared
2. temperatureThe resulting mixture was heated
3. temperatureunder reflux for 3 hours
4. customa reaction
5. temperatureto cool down
6. filtrationthe insoluble matter was filtered off
7. concentrationthe filtrate was then concentrated
8. customThe concentrate was purified by chromatography on a silica gel column (eluent: chloroform)