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1. 发明授权

US5104992A Method of preparing 2-phenyl benezothriazoles 失效
标题翻译：制备2-苯基苯并噻唑的方法
公开(公告)号：US5104992A
公开(公告)日：1992-04-14
申请号：US504101
申请日：1990-04-02
申请人： Naohiko Fukuoka , Kazunobu Kubota , Kunitoshi Iguchi
发明人： Naohiko Fukuoka , Kazunobu Kubota , Kunitoshi Iguchi
IPC分类号： B01J23/40 , B01J25/02 , C07B61/00 , C07D249/20
CPC分类号： C07D249/20
摘要： A method of preparing 2-phenylbenzotriazoles expressed by Formula I: ##STR1## (wherein R.sub.1 denotes a hydrogen or chlorine atom, a lower alkyl group having 1 to 4 carbon atoms, a lower alkoxyl group having 1 to 4 carbon atoms, a carboxyl group or a sulfonic acid group; R.sub.2 denotes a hydrogen or chlorine atom, a lower alkyl group having 1 to 4 carbon atoms or a lower alkoxyl group having 1 to 4 carbon atoms; R.sub.3 denotes a hydrogen or chlorine atom, an alkyl group having 1 to 12 carbon atoms, a lower alkoxy group having 1 to 4 carbon atoms, a phenyl group, a phenyl group substituted by an alkyl group having 1 to 8 carbon atoms, a phenoxy group or a phenylalkyl group with an alkyl part having 1 to 4 carbon atoms; R.sub.4 denotes a hydrogen or chlorine atom, a hydroxyl group or an alkoxyl group having 1 to 4 carbon atoms; and R.sub.5 denotes a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a phenylalkyl group with an alkyl part having 1 to 4 carbon atoms) comprises reducing with hydrogen 2-phenylbenzotriazole-N-oxides expressed by Formula II: ##STR2## (wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each denotes the same as in Formula I).

2. 发明授权

US5187289A Method of preparing 2-phenyl benzotriazoles 失效
标题翻译：制备2-苯基苯并三唑的方法
公开(公告)号：US5187289A
公开(公告)日：1993-02-16
申请号：US740868
申请日：1991-07-31
申请人： Naohiko Fukuoka , Kazunobu Kubota , Kunitoshi Iguchi
发明人： Naohiko Fukuoka , Kazunobu Kubota , Kunitoshi Iguchi
IPC分类号： C07D249/20
CPC分类号： C07D249/20
摘要： A method of preparing 2-phenylbenzotriazoles expressed by Formula I: ##STR1## (wherein R.sub.1 denotes a hydrogen or chlorine atom, a lower alkyl group having 1 to 4 carbon atoms, a lower alkoxyl group having 1 to 4 carbon atoms, a carboxyl group or a sulfonic acid group; R.sub.2 denotes a hydrogen or chlorine atom, a lower alkyl group having 1 to 4 carbon atoms or a lower alkoxyl group having 1 to 4 carbon atoms; R.sub.3 denotes a hydrogen or chlorine atom, an alkyl group having 1 to 12 carbon atoms, a lower alkoxyl group having 1 to 4 carbon atoms, a phenyl group, a phenyl group substituted by an alkyl group having 1 to 8 carbon atoms, a phenoxy group or a phenylalkyl group with an alkyl part having 1 to 4 carbon atoms; R.sub.4 denotes a hydrogen or chlorine atom, a hydroxyl group or an alkoxyl group having 1 to 4 carbon atoms; and R.sub.5 denotes a hydrogen atom, an alkyl group having 1 to 12 carbon atoms or a phenylalkyl group with an alkyl part having 1 to 4 carbon atoms) comprises reduction with hydrogen of o-nitroazobenzene derivatives expressed by Formula II: ##STR2## (wherein R.sub.1, R.sub.2, R.sub.3, R.sub.4 and R.sub.5 each denote the same as in Formula I), the reduction being effected in a solvent containing water.
摘要翻译：由式I表示的2-苯基苯并三唑的制备方法：其中，R1表示氢或氯原子，碳原子数1〜4的低级烷基，碳原子数1〜4的低级烷氧基，羧基或磺酸基; R2表示氢或氯原子，碳原子数1〜4的低级烷基或碳原子数1〜4的低级烷氧基; R3表示氢或氯原子，具有1〜 12个碳原子，具有1〜4个碳原子的低级烷氧基，苯基，被碳原子数1〜8的烷基取代的苯基，苯氧基或具有1〜4个碳原子的烷基部分的苯基烷基原子; R4表示氢或氯原子，羟基或碳原子数1〜4的烷氧基，R5表示氢原子，碳原子数1〜12的烷基或烷基部分的苯基烷基为1 至4个碳原子）包括用氢还原由式II表示的邻硝基偶氮苯衍生物：其中R 1，R 2，R 3，R 4和R 5各自表示与式I中相同的基团），所述还原是在含有水的溶剂中进行的。

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