Synthesis method of light stabilizer HS-112

The invention discloses a synthesis method the a light stabilizer bis(1-octyoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate, belongs to the field of organic chemical synthesis. The bis(1-octyoxy-2,2,6,6-tetramethyl-4-piperidyl) sebacate is the material, ethanol solution is the solvent, and magnesium hydrate or magnesium chloride hexahydrate is the catalyst. Oxidation reaction is conducted with the action of aquae hydrogenii dioxidi which is used as the oxidant to generate bis(2,2,6,6-tetramethyl-1-piperidinyloxy-4-yl)sebacate free radicals. Then molybdenum trioxide is used as the catalyst, normal octane is used as the material and solvent to react with the bis(2,2,6,6-tetramethyl-1-piperidinyloxy-4-yl)sebacate free radicals to obtain the light stabilizer HS-112. The method uses two steps to synthesize the HS-112. The process is simple, the reaction time is short the side effects are few, the pollution is minimal, the production cost is low, the reaction yield rate is high, and therefore the industrial application prospect is good.