In the study of the synthesis of 2‐(2′‐hydroxy‐5′‐carboxyphenyl)‐2H‐benzotriazole, we found that decarboxy intermediate‐4‐((2‐nitrophenyl)diazenyl)phenol was obtained when using p‐hydroxybenzoic acid as coupling component. A convenient protocol for the synthesis of 2‐(2′‐hydroxy‐5′‐carboxyphenyl)‐2H‐benzotriazole is reported with methyl‐p‐hydroxybenzoate as coupling component. Different dizao components and different coupling components were also used for further investigation of decarboxylation.
A Convenient Protocol for the Synthesis of 2-(2'-Hydroxy-5'-carboxyphenyl)--2H-benzotriazole to Avoid Decarboxylation When Using p-Hydroxybenzoic Acid as Coupling Component. -(MA*, W.; TUO, T.; HU, J.; LIU, Y.; ZHANG, S.; J. Heterocycl. Chem. 51 (2014) 3, 803-807, http://dx.
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