GB1494826A - Process for the production of 2-aryl-2h-benzotriazoles - Google Patents

Process for the production of 2-aryl-2h-benzotriazoles

Info

Publication number
GB1494826A
GB1494826A GB1968876A GB1968876A GB1494826A GB 1494826 A GB1494826 A GB 1494826A GB 1968876 A GB1968876 A GB 1968876A GB 1968876 A GB1968876 A GB 1968876A GB 1494826 A GB1494826 A GB 1494826A
Authority
GB
United Kingdom
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
Application number
GB1968876A
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Novartis AG
Original Assignee
Ciba Geigy AG
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ciba Geigy AG filed Critical Ciba Geigy AG
Publication of GB1494826A publication Critical patent/GB1494826A/en
Expired legal-status Critical Current

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. <IMAGE>
GB1968876A 1975-05-14 1976-05-13 Process for the production of 2-aryl-2h-benzotriazoles Expired GB1494826A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US57738675A 1975-05-14 1975-05-14

Publications (1)

Publication Number Publication Date
GB1494826A true GB1494826A (en) 1977-12-14

Family

ID=24308487

Family Applications (1)

Application Number Title Priority Date Filing Date
GB1968876A Expired GB1494826A (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)

Cited By (1)

* Cited by examiner, † Cited by third party
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

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
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)

* Cited by examiner, † Cited by third party
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

Cited By (1)

* Cited by examiner, † Cited by third party
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

Also Published As

Publication number Publication date
NL7605204A (en) 1976-11-16
BR7603023A (en) 1977-05-31
BE841771A (en) 1976-11-16
DE2620896A1 (en) 1976-12-02
ES447876A1 (en) 1977-07-16
CH615167A5 (en) 1980-01-15
FR2311013A1 (en) 1976-12-10
FR2311013B1 (en) 1978-05-19
JPS51138679A (en) 1976-11-30
ES447875A1 (en) 1977-07-16
JPS6036432B2 (en) 1985-08-20

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Legal Events

Date Code Title Description
PS Patent sealed
PCNP Patent ceased through non-payment of renewal fee