ES447875A1 - Process for the production of 2-aryl-2h-benzotriazoles - Google Patents
Process for the production of 2-aryl-2h-benzotriazolesInfo
- Publication number
- ES447875A1 ES447875A1 ES447875A ES447875A ES447875A1 ES 447875 A1 ES447875 A1 ES 447875A1 ES 447875 A ES447875 A ES 447875A ES 447875 A ES447875 A ES 447875A ES 447875 A1 ES447875 A1 ES 447875A1
- Authority
- ES
- Spain
- Prior art keywords
- benzotriazoles
- aryl
- production
- nitroazobenzene
- cyclising
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C07—ORGANIC CHEMISTRY
- C07D—HETEROCYCLIC COMPOUNDS
- C07D249/00—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms
- C07D249/16—Heterocyclic compounds containing five-membered rings having three nitrogen atoms as the only ring hetero atoms condensed with carbocyclic rings or ring systems
- C07D249/18—Benzotriazoles
- C07D249/20—Benzotriazoles with aryl radicals directly attached in position 2
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Catalysts (AREA)
- Springs (AREA)
- Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
Abstract
2-Aryl-2H-benzotriazoles of the formula I are prepared by reducing a suitable o-nitroazobenzene with hydrogen in an alkaline medium of pH greater than 10 in the presence of a nickel hydrogenation catalyst at 20 to 100 DEG C and a pressure of 1 to 66 atmospheres, and cyclising the product. The meanings of the symbols are given in Claim 1. The compounds can be used as UV stabilisers. The process is environmentally friendly and gives high yields.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US57738675A | 1975-05-14 | 1975-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES447875A1 true ES447875A1 (en) | 1977-07-16 |
Family
ID=24308487
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES447876A Expired ES447876A1 (en) | 1975-05-14 | 1976-05-13 | Process for the production of 2-aryl-2h-benzotriazoles |
ES447875A Expired ES447875A1 (en) | 1975-05-14 | 1976-05-13 | Process for the production of 2-aryl-2h-benzotriazoles |
Family Applications Before (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES447876A Expired ES447876A1 (en) | 1975-05-14 | 1976-05-13 | Process for the production of 2-aryl-2h-benzotriazoles |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS6036432B2 (en) |
BE (1) | BE841771A (en) |
BR (1) | BR7603023A (en) |
CH (1) | CH615167A5 (en) |
DE (1) | DE2620896A1 (en) |
ES (2) | ES447876A1 (en) |
FR (1) | FR2311013A1 (en) |
GB (1) | GB1494826A (en) |
NL (1) | NL7605204A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4668235A (en) * | 1982-12-07 | 1987-05-26 | The Commonwealth Of Australia Commonwealth Scientific & Industrial Research Organization | Use of substituted 2-(2-hydroxyaryl)-2H-benzotriazolesulfonates as photostabilizing agents for natural synthetic fibres |
JPS6471862A (en) * | 1987-09-11 | 1989-03-16 | Chemipro Kasei Kaisha Ltd | Production of 2-phenylbenzotriazole |
JPH02202880A (en) * | 1989-01-31 | 1990-08-10 | Kemipuro Kasei Kk | Production of 2-phenylbenzotriazoles |
JPH02202879A (en) * | 1989-01-31 | 1990-08-10 | Kemipuro Kasei Kk | Production of 2-phenylbenzotriazoles |
US5675015A (en) * | 1996-03-07 | 1997-10-07 | Eastman Kodak Company | Process for the preparation of benzotriazole derivatives |
JP6131400B2 (en) * | 2013-01-29 | 2017-05-24 | シプロ化成株式会社 | Benzotriazole derivative compounds |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CH529815A (en) * | 1970-06-19 | 1972-10-31 | Ciba Geigy Ag | Use of 2- (2'-hydroxyphenyl) -benzotriazole compounds as light stabilizers |
US3978074A (en) * | 1973-11-21 | 1976-08-31 | Uniroyal Inc. | Method of making hydroxyarylbenzotriazoles and their N-oxides |
-
1976
- 1976-05-12 DE DE19762620896 patent/DE2620896A1/en not_active Ceased
- 1976-05-12 CH CH593976A patent/CH615167A5/en not_active IP Right Cessation
- 1976-05-13 FR FR7614394A patent/FR2311013A1/en active Granted
- 1976-05-13 BR BR7603023A patent/BR7603023A/en unknown
- 1976-05-13 BE BE166976A patent/BE841771A/en not_active IP Right Cessation
- 1976-05-13 ES ES447876A patent/ES447876A1/en not_active Expired
- 1976-05-13 ES ES447875A patent/ES447875A1/en not_active Expired
- 1976-05-13 GB GB1968876A patent/GB1494826A/en not_active Expired
- 1976-05-14 NL NL7605204A patent/NL7605204A/en not_active Application Discontinuation
- 1976-05-14 JP JP5519876A patent/JPS6036432B2/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
NL7605204A (en) | 1976-11-16 |
JPS6036432B2 (en) | 1985-08-20 |
GB1494826A (en) | 1977-12-14 |
JPS51138679A (en) | 1976-11-30 |
DE2620896A1 (en) | 1976-12-02 |
CH615167A5 (en) | 1980-01-15 |
FR2311013B1 (en) | 1978-05-19 |
BR7603023A (en) | 1977-05-31 |
ES447876A1 (en) | 1977-07-16 |
BE841771A (en) | 1976-11-16 |
FR2311013A1 (en) | 1976-12-10 |
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