Abstract: The object of the present invention is to provide a method for producing substituted-1,3,5-triazine derivatives at high yield, in which at least one of carbon atoms in the ring thereof is substituted by a secondary amine group having at leat one of alkyl groups. The method of the present invention is a method for alkylation of 1,3,5-triazine derivatives, characterized by reacting 1,3,5-triazine derivatives (melamines, melamine derivatives, various kinds of guanaminde derivatives, etc.) which has at least one or more amino groups or mono-substituted amino groups on carbon atom of the ring thereof, with aldehydes or ketones alcohols in the presence of a catalyst of a metal of group VII and/or group VIII in the periodic table and a hydrogen-containing gas to alkylate said at least one of amino groups or mono-substituted amino groups.

Abstract: A method for modifying 1,3,5-triazine derivatives characterized by heating and reacting a 1,3,5-triazine derivatives having at least one amino or mono-substituted amino group on a carbon atom or atoms on its ring with an alcohol in the presence of a metal catalyst and a hydrogen atom to introduce an alkyl group or an alkenyl group into each amino or mono-substituted amino group; another method for modifying 1,3,5-triazine derivatives characterized by heating and reacting a 1,3,5-triazine derivatives having at least one amino or mono-substituted amino group on a carbon atom or atoms on its ring with a dihydric alcohol in the presence of a metal catalyst and a hydrogen atom to introduce an alkyl group having a hydroxyl group into each amino or mono-substituted amino group; and 1,3,5-triazine derivatives obtained by the methods. The various modified sustituted 1,3,5-triazine derivatives thus produced are generally obtained as a mixture.

Abstract: A method for alkylation of at least one or more amino groups or mono-substituted amino groups, each on a carbon atom of a triazine ring of 1,3,5-triazine derivatives (melamine, melamine derivatives and various kinds of guanamine derivatives and the like), which includes reacting the 1,3,5-triazine derivatives having at least one or more amino groups or mono-substituted amino groups with alcohols in the presence of a catalyst of a metal of group VII and/or group VIII in the periodic table. The object of the invention is to provide a method for alkylation of 1,3,5-triazine derivatives, which includes alkylating amino groups or mono-substituted amino groups in carbon atoms of a 1,3,5-triazine ring, whereby substituted 1,3,5-triazine derivatives which are a group of useful compounds and which are widely used as intermediates of fine chemicals such as agricultural chemicals, medications, dye-stuffs, paints and the like, as resin materials and as flame-retardant materials can be easily produced in high yields.