A 7.5 mg (60 μmol) portion of p-fluorobenzylamine and 52 μl of diisopropylethylamine were added to a mixed solution of 400 μl of acetonitrile and 120 μl of N-methylpyrrolidone containing 8.9 mg (30 μmol) of 6-chloro-N,N′-diphenyl-1,3,5-triazine-2,4-diamine and stirred at 80° C. for 3 hours. The reaction solution was filtered and then injected into a fractional LC-MS apparatus to collect a fraction containing the desired molecular weight. By evaporating the solvent, 6.1 mg (yield 45%) of N,N′-diphenyl-N″-(4-fluorobenzyl)-1,3,5-triazine-2,4,6-triamine was obtained. A retention time of 2.77 minutes and a purity of 93% were determined by an analytical LC-MS.
