ES447873A1 - Process for the production of 2-aryl-2h-benzotriazoles - Google Patents
Process for the production of 2-aryl-2h-benzotriazolesInfo
- Publication number
- ES447873A1 ES447873A1 ES447873A ES447873A ES447873A1 ES 447873 A1 ES447873 A1 ES 447873A1 ES 447873 A ES447873 A ES 447873A ES 447873 A ES447873 A ES 447873A ES 447873 A1 ES447873 A1 ES 447873A1
- 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)
- Organic Low-Molecular-Weight Compounds And Preparation Thereof (AREA)
- Catalysts (AREA)
Abstract
2-Aryl-2H-benzotriazoles of the formula I are prepared by reducing a suitable o-nitroazobenzene with hydrogen in the form of a mixture in an aqueous alkaline medium at a pH greater than 10 in the presence of a noble metal hydrogenation catalyst, of Group VIII of the Periodic Table, or an oxide at 20 to 100 DEG C and 1 to 66 atmospheres, and cyclising the product. The meanings of the individual 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 |
---|---|---|---|
US57738375A | 1975-05-14 | 1975-05-14 |
Publications (1)
Publication Number | Publication Date |
---|---|
ES447873A1 true ES447873A1 (en) | 1977-07-16 |
Family
ID=24308470
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
ES447873A Expired ES447873A1 (en) | 1975-05-14 | 1976-05-13 | Process for the production of 2-aryl-2h-benzotriazoles |
Country Status (9)
Country | Link |
---|---|
JP (1) | JPS6036429B2 (en) |
BE (1) | BE841768A (en) |
BR (1) | BR7603027A (en) |
CH (1) | CH615165A5 (en) |
DE (1) | DE2621006A1 (en) |
ES (1) | ES447873A1 (en) |
FR (1) | FR2311010A1 (en) |
GB (1) | GB1494825A (en) |
NL (1) | NL7605202A (en) |
Families Citing this family (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1984002365A1 (en) * | 1982-12-07 | 1984-06-21 | Commw Scient Ind Res Org | Use of substituted 2-(2'-hydroxyaryl)-2h-benzotriazolesulfonates as photostabilising agents for natural and synthetic fibres |
JPS6471862A (en) * | 1987-09-11 | 1989-03-16 | Chemipro Kasei Kaisha Ltd | Production of 2-phenylbenzotriazole |
EP0363318B1 (en) * | 1988-09-28 | 1994-03-02 | Ciba-Geigy Ag | Process for the preparation of benzotriazole derivatives |
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 |
EP0419412B1 (en) * | 1989-09-20 | 1993-11-10 | Ciba-Geigy Ag | Process for the preparation of benzotriazoles |
CN112538055A (en) * | 2020-12-11 | 2021-03-23 | 西安凯立新材料股份有限公司 | Preparation method of benzotriazole ultraviolet absorbent |
CN113480487B (en) * | 2021-06-16 | 2022-12-02 | 三峡大学 | Benzotriazole-containing fluorescent compound, and preparation method and application thereof |
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 CH CH593676A patent/CH615165A5/en not_active IP Right Cessation
- 1976-05-12 DE DE19762621006 patent/DE2621006A1/en not_active Ceased
- 1976-05-13 FR FR7614391A patent/FR2311010A1/en active Granted
- 1976-05-13 GB GB1968776A patent/GB1494825A/en not_active Expired
- 1976-05-13 BE BE166973A patent/BE841768A/en not_active IP Right Cessation
- 1976-05-13 ES ES447873A patent/ES447873A1/en not_active Expired
- 1976-05-13 BR BR7603027A patent/BR7603027A/en unknown
- 1976-05-14 JP JP5519576A patent/JPS6036429B2/en not_active Expired
- 1976-05-14 NL NL7605202A patent/NL7605202A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
FR2311010B1 (en) | 1978-05-19 |
FR2311010A1 (en) | 1976-12-10 |
BE841768A (en) | 1976-11-16 |
JPS6036429B2 (en) | 1985-08-20 |
DE2621006A1 (en) | 1976-12-02 |
BR7603027A (en) | 1977-05-31 |
CH615165A5 (en) | 1980-01-15 |
JPS51138676A (en) | 1976-11-30 |
GB1494825A (en) | 1977-12-14 |
NL7605202A (en) | 1976-11-16 |
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