发明授权
US06387992B1 Substituted 5-heteroaryl-2-(2-hydroxyphenyl)-2h-benzotriazole UV absorbers, a process for preparation thereof and compositions stabilized therewith
失效
取代的5-杂芳基-2-（2-羟基苯基）-2h苯并三唑UV吸收剂，其制备方法和用其稳定的组合物
- 专利标题： Substituted 5-heteroaryl-2-(2-hydroxyphenyl)-2h-benzotriazole UV absorbers, a process for preparation thereof and compositions stabilized therewith
- 专利标题（中）： 取代的5-杂芳基-2-（2-羟基苯基）-2h苯并三唑UV吸收剂，其制备方法和用其稳定的组合物
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申请号： US09722973申请日： 2000-11-27
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公开(公告)号： US06387992B1公开(公告)日： 2002-05-14
- 发明人: Stephen D. Pastor , Anthony DeBellis , Mervin G. Wood , Joseph Suhadolnik , Deborah DeHessa , Ramanathan Ravichandran
- 申请人： Stephen D. Pastor , Anthony DeBellis , Mervin G. Wood , Joseph Suhadolnik , Deborah DeHessa , Ramanathan Ravichandran
- 主分类号： C08K53472
- IPC分类号： C08K53472
摘要：
Compounds of formula I or II where R is a heteroaryl moiety, such as 3-pyridyl, or T is a heteroaryl moiety, such as thien-2,5-diyl, and E1 and E2 are independently hydrogen, alkyl, aralkyl and the like, are prepared by reaction of a benzotriazole substituted on the 5-position of the benzo ring by a halogen atom with a heteroarylboronic acid or ester in the presence of a transition-metal catalyst, such as palladium (II) diacetate. The benzotriazole compounds of formula I are particularly efficacious as stabilizers for automotive coatings and candle wax.
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