发明授权
US07074906B2 Organic solvent-free process for the preparation of 2-(2-nitrophenylazo)phenols 失效
用于制备2-(2-硝基苯基偶氮)苯酚的无机溶剂方法

Organic solvent-free process for the preparation of 2-(2-nitrophenylazo)phenols
摘要:
Provided is a novel one-pot, organic solvent-free process for the preparation of 2-(2-nitrophenylazo) substituted phenols. The 2-(2-nitrophenylazo) substituted phenols are precursors for hydroxyphenylbenzotriazole UV absorbers.
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