JPS57167976A - 2-phenylbenzotriazole-n-oxides and their preparations - Google Patents

2-phenylbenzotriazole-n-oxides and their preparations

Info

Publication number
JPS57167976A
JPS57167976A JP5354281A JP5354281A JPS57167976A JP S57167976 A JPS57167976 A JP S57167976A JP 5354281 A JP5354281 A JP 5354281A JP 5354281 A JP5354281 A JP 5354281A JP S57167976 A JPS57167976 A JP S57167976A
Authority
JP
Japan
Prior art keywords
compound shown
alkyl
formulai
formaldehyde
alkali metal
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.)
Pending
Application number
JP5354281A
Other languages
Japanese (ja)
Inventor
Shuichi Seino
Tomizo Fujino
Hidetaka Chiba
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.)
SHIPURO KASEI KK
Original Assignee
SHIPURO KASEI KK
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 SHIPURO KASEI KK filed Critical SHIPURO KASEI KK
Priority to JP5354281A priority Critical patent/JPS57167976A/en
Publication of JPS57167976A publication Critical patent/JPS57167976A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE: To obtain the titled substances in high yield, by reducing an o-nitroazobenzene with formaldehyde and a napthoquinone in the presence of a surface active agent or a polyhydric alcohol and an alkali metal hydroxide in water or a hydrophilic solvent.
CONSTITUTION: A compound shown by the formulaI(R1 is H, Cl, alkyl, carboxyl, etc.; R2 is H, Cl; R3 is H, Cl, alkyl, phenyl, etc.; R4 is H, Cl, OH, etc.; R5 is H, alkyl, etc.) is reduced with formaldehyde and a naphthoquinone in the presence of a surface active agent or a polyhydric alcohol (0.5W6wt% based on the compound shown by the formulaI) as a dispersant and an alkali metal hydroxide (≥ stoichiometric amount) in water or a hydrophilic solvent, to give compounds shown by the formula II and III.
USE: The compound shown by the formula III is an ultraviolet light absorber, and the compound II is an intermediate for the compound shown by the formula III.
COPYRIGHT: (C)1982,JPO&Japio
JP5354281A 1981-04-09 1981-04-09 2-phenylbenzotriazole-n-oxides and their preparations Pending JPS57167976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5354281A JPS57167976A (en) 1981-04-09 1981-04-09 2-phenylbenzotriazole-n-oxides and their preparations

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5354281A JPS57167976A (en) 1981-04-09 1981-04-09 2-phenylbenzotriazole-n-oxides and their preparations

Publications (1)

Publication Number Publication Date
JPS57167976A true JPS57167976A (en) 1982-10-16

Family

ID=12945682

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5354281A Pending JPS57167976A (en) 1981-04-09 1981-04-09 2-phenylbenzotriazole-n-oxides and their preparations

Country Status (1)

Country Link
JP (1) JPS57167976A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606670A (en) * 1983-06-01 1985-01-14 チバ−ガイギ−　アクチエンゲゼルシヤフト Manufacture of 2-(2-hydroxyphenyl)-benzotriazole
US4780541A (en) * 1986-08-22 1988-10-25 Chemipro Kasei Kaisha, Ltd. Method for preparing 2-phenylbenzotriazoles and 2-phenylbenzotriazole-N-oxides
JPH01117873A (en) * 1987-10-30 1989-05-10 Kemipuro Kasei Kk Production of 2-phenylbenzotriazole-n-oxides

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5363379A (en) * 1976-11-17 1978-06-06 Nippon Kayaku Co Ltd Preparation of 2-phenylbenzotriazoles or their n-oxides

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5363379A (en) * 1976-11-17 1978-06-06 Nippon Kayaku Co Ltd Preparation of 2-phenylbenzotriazoles or their n-oxides

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS606670A (en) * 1983-06-01 1985-01-14 チバ−ガイギ−　アクチエンゲゼルシヤフト Manufacture of 2-(2-hydroxyphenyl)-benzotriazole
US4780541A (en) * 1986-08-22 1988-10-25 Chemipro Kasei Kaisha, Ltd. Method for preparing 2-phenylbenzotriazoles and 2-phenylbenzotriazole-N-oxides
US4835284A (en) * 1986-08-22 1989-05-30 Chemipro Kasei Kaisha, Ltd. Method for preparing 2-phenylbenzotriazoles and 2-phenylbenzotriazole-N-oxides
JPH01117873A (en) * 1987-10-30 1989-05-10 Kemipuro Kasei Kk Production of 2-phenylbenzotriazole-n-oxides

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