Method for the industrial production of 2-halo- 4,6-dialkoxy-l,3,5-triazines and their use in the presence of amines

A method for the synthesis of 2-halo-4,6-dialkoxy-1,3,5-triazines of formula III:

• wherein:
• R1 and R2 are independently —CH3, —CH2CH3, —CH(CH3)2, —(CH2)2CH3, or —(CH2)3CH3, and
• X is Cl− or Br−;
• performed in the presence of water,
• said method comprising the steps of:
• conducting a substitution reaction between the corresponding cyanuric trihalogenide C3N3X3, where X is Br− or Cl− (compound of formula I), and a linear or branched aliphatic alcohol, in single phase, in the presence of a base;
• quenching the reaction by adding water and stirring;
• performing filtration;
• and
• drying,
• wherein the molar ratio between the reagents:
• mol compound of formula I/mol base/mol water/mol alcohol is comprised between 1/6/7.7/4 and 1/7.9/10/4.1;
• wherein the substitution reaction is conducted at a temperature of between 45° C. and 135° C. for a time comprised between 5 h and 48 h.