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
- 专利标题: Organic solvent-free process for the preparation of 2-(2-nitrophenylazo)phenols
- 专利标题(中): 用于制备2-(2-硝基苯基偶氮)苯酚的无机溶剂方法
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申请号: US10497621申请日: 2002-11-26
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公开(公告)号: US07074906B2公开(公告)日: 2006-07-11
- 发明人: Stephen Daniel Pastor , Joseph Suhadolnik , Deborah Judd , Mervin Gale Wood
- 申请人: Stephen Daniel Pastor , Joseph Suhadolnik , Deborah Judd , Mervin Gale Wood
- 申请人地址: US NY Tarrytown
- 专利权人: Ciba Specialty Chemicals Corporation
- 当前专利权人: Ciba Specialty Chemicals Corporation
- 当前专利权人地址: US NY Tarrytown
- 代理商 Tyler A. Stevenson
- 国际申请: PCT/EP02/13292 WO 20021126
- 国际公布: WO03/048257 WO 20030612
- 主分类号: C09B41/00
- IPC分类号: C09B41/00 ; C07D249/20
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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