Title:
PRODUCTION OF BISBENZOTRIAZOLYLPHENOLIC COMPOUND
Document Type and Number:
Japanese Patent JP2983515
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To provide a method for easily and efficiently producing the subject compound excellent in ultraviolet ray absorbability capable of providing e.g. resin with weather resistance of long duration and useful as a polycondensed ultraviolet ray absorbing agent by employing a specific methylene bisphenol compound as an intermediate for synthesis.
SOLUTION: This compound is obtained by subjecting a methylene bisphenol compound [e.g. 3,3'-methylenebis(4-hydroxyphenetial alcohol)] of formula I (A is e.g. an 1-6C alkylene; and R1 and R2 are each e.g. OH) as an intermediate for synthesis to azo-coupling with pref. a compound of formula II (R3 is e.g. H) and compound (e.g. a hydrochloric acid liquid of diazonium salt of o- nitroaniline) of formula III(R4 is e.g. H) in a solvent and by reducing the resultant bisazobenzene compound in the condition of base, thus obtaining the objective compound of formula IV of {e.g. 2,2'-methylene bis[6-(2H-benzotriazole-2- yl)-4-(2-hydroxyethyl)phenol]}.
Inventors:
MORI KOJI
AKATA ATSUO
AKATA ATSUO
Application Number:
JP9636898A
Publication Date:
November 29, 1999
Filing Date:
April 08, 1998
Export Citation:
Assignee:
OOTSUKA KAGAKU KK
International Classes:
C07D249/20; C07C39/16; C07C245/08; (IPC1-7): C07D249/20
Domestic Patent References:
| JP8245463A | ||||
| JP5285128A | ||||
| JP653733B2 |
Other References:
【文献】国際公開97/12882(WO,A1)
【文献】国際公開97/35847(WO,A1)
【文献】Chemical Abstracts;vol.68(No.16)(1968.4.15)p6718抄録番号 69421j
【文献】国際公開97/35847(WO,A1)
【文献】Chemical Abstracts;vol.68(No.16)(1968.4.15)p6718抄録番号 69421j
Attorney, Agent or Firm:
Hirokatsu Kamei (1 person outside)
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