127464-43-1

Preparation

3.5 liters of ethanol, 1.2 kg of 2-ethyl-6-methyl-3-hydroxypyridine and 1.0 kg of succinic acid were added to the reactor. The reaction mass is heated to the boiling point of ethanol (78°C) and stirring is continued for 20 minutes until the components are completely dissolved. Then, keep the reaction mass in the reactor under stirring until the temperature reaches 20°C, cool to 5°C and keep at this temperature for 16 hours, stirring occasionally. The suspension is then stirred until the material is homogeneous, overloaded in a centrifuge and filtered. The precipitate of the succinate salt of 2-ethyl-6-methyl-3-hydroxypyridine was dried to constant weight in a vacuum oven at 45°C. The yield of the target product 2-ethyl-6-methyl-3-hydroxypyridine succinate (Mexitrad) was 89%.