Synthesis method of ultraviolet light absorber 2-(2-hydroxy-3, 5-dicumyl phenyl) benzotriazole

• Main Authors: LIU BIN, HU XINLI, XIANG ZHANBO, WANG ZHANG, DOU SHENGHUA, DUAN JUNHONG
• Format: Patent
• Language: Chinese; English
• Published: 12.07.2022
• Subjects: CHEMISTRY; HETEROCYCLIC COMPOUNDS; METALLURGY; ORGANIC CHEMISTRY

The invention belongs to the technical field of organic synthesis, and relates to a synthesis method of 2-(2-hydroxy-3, 5-dicumyl phenyl) benzotriazole, o-nitroaniline, sodium nitrite, 2, 4-dicumyl phenol, hydrazine hydrate, glucose, hydrogen and the like are used as raw materials, the total yield of the four-step reaction is greater than or equal to 85%, the product purity is greater than or equal to 99.0%, and the light transmittance is greater than or equal to 98.0% (460nm); the method disclosed by the invention is a simple, convenient, clean and efficient method for synthesizing the ultraviolet light absorber 2-(2-hydroxy-3, 5-dicumyl phenyl) benzotriazole, and the product quality is good. 本发明属于有机合成技术领域，涉及一种2-(2-羟基-3,5-二枯基苯基)苯并三唑的合成方法，以邻硝基苯胺、亚硝酸钠、2,4-二枯基苯酚、水合肼、葡萄糖、氢气等为原料，四步反应总收率≥85％，产品纯度≥99.0％，透光率≥98.0％(460nm)；本发明是一种简便、清洁、高效合成紫外线吸收剂2-(2-羟基-3,5-二枯基苯基)苯并三唑的方法，且产品品质好。