Treatment of cyanuric chloride (I) with methylmagnesium chloride afforded 2,4-dichloro-6-methyltriazine (II), which was condensed with aniline (III) to produce the anilinotriazine (IV). Subsequent displacement of the remaining chlorine atom of (IV) with morpholine (V) provided (VI). The target compound was then obtained by N-alkylation with iodoethane in the presence of NaH, followed by conversion to the methanesulfonate salt).