Aniline (I) was diazotized, and then precipitated as the hexafluorophosphate salt (II). Refluxing in p-xylene afforded an inseparable mixture of fluorinated (III) and nonfluorinated (IV) products. This mixture was treated with CuCN to furnish a mixture of nitriles, from which the major fluorinated nitrile (V) was separated by silica gel chromatography. Subsequent reduction of nitrile (V) by catalytic hydrogenation in the presence of Pd/C provided benzylamine (VII). Finally, displacement of the 4-chloro group of pyrrolopyrimidine (VIII) with (VII) in the presence of K2CO3 in boiling water yielded the target compound.