ES447876A1 - Process for the production of 2-aryl-2h-benzotriazoles - Google Patents

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

Info

Publication number
ES447876A1
ES447876A1 ES447876A ES447876A ES447876A1 ES 447876 A1 ES447876 A1 ES 447876A1 ES 447876 A ES447876 A ES 447876A ES 447876 A ES447876 A ES 447876A ES 447876 A1 ES447876 A1 ES 447876A1
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
Application number
ES447876A
Other languages
Spanish (es)
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 ES447876A1 publication Critical patent/ES447876A1/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)
  • Low-Molecular Organic Synthesis Reactions Using Catalysts (AREA)
  • Springs (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.
ES447876A 1975-05-14 1976-05-13 Process for the production of 2-aryl-2h-benzotriazoles Expired ES447876A1 (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
ES447876A1 true ES447876A1 (en) 1977-07-16

Family

ID=24308487

Family Applications (2)

Application Number Title Priority Date Filing Date
ES447875A Expired ES447875A1 (en) 1975-05-14 1976-05-13 Process for the production of 2-aryl-2h-benzotriazoles
ES447876A Expired ES447876A1 (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
ES447875A Expired ES447875A1 (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) ES447875A1 (en)
FR (1) FR2311013A1 (en)
GB (1) GB1494826A (en)
NL (1) NL7605204A (en)

Families Citing this family (6)

* 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
JPS6471862A (en) * 1987-09-11 1989-03-16 Chemipro Kasei Kaisha Ltd Production of 2-phenylbenzotriazole
JPH02202879A (en) * 1989-01-31 1990-08-10 Kemipuro Kasei Kk Production of 2-phenylbenzotriazoles
JPH02202880A (en) * 1989-01-31 1990-08-10 Kemipuro Kasei Kk Method for producing 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

Also Published As

Publication number Publication date
DE2620896A1 (en) 1976-12-02
BE841771A (en) 1976-11-16
NL7605204A (en) 1976-11-16
CH615167A5 (en) 1980-01-15
ES447875A1 (en) 1977-07-16
JPS51138679A (en) 1976-11-30
BR7603023A (en) 1977-05-31
FR2311013A1 (en) 1976-12-10
JPS6036432B2 (en) 1985-08-20
FR2311013B1 (en) 1978-05-19
GB1494826A (en) 1977-12-14

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Legal Events

Date Code Title Description
FD1A Patent lapsed

Effective date: 19870420