PRODUCTION OF 2-PHENYLBENZOTRIAZOLES,申请号JP19890022222-传众专利搜索

PRODUCTION OF 2-PHENYLBENZOTRIAZOLES

申请公布号：JPH02202877(A)

申请号：JP19890022222

申请日期：1989.01.31

申请公布日期：1990.08.10

申请人：

KEMIPURO KASEI KK

发明人：SEINO SHUICHI;FUJINO TOMIZO;OMAE YOSHINORI

分类号：C07D249/20;B01J31/02;C07B61/00;C09K3/00

主分类号：C07D249/20

摘要：PURPOSE:To produce the subject compound useful as an ultraviolet absorber without causing pollution problem at a low cost by reacting an o- nitroazobenzene derivative with an alcohol using naphthoquinones as a catalyst and a specific aromatic compound as a cocatalyst in the presence of water and a base. CONSTITUTION:The objective compound of formula II is produced by reducing an o-nitroazobenzene derivative of formula I (R1 is H, Cl, 1-4C lower alkyl, 1-4C lower alkoxy, carboxy, etc.; R2 is H, Cl, 1-4C lower alkyl, etc.; R3 is H, Cl, 1-12C alkyl, 1-4C lower alkoxy, etc.; R4 is H, Cl, hydroxy, etc.) with at least one kind of >=3C alcohol selected from primary alcohol and secondary alcohol in the presence of water and a base using naphthoquinones as a catalyst and an aromatic compound having >=2 hydroxyl groups (preferably catechol, hydroquinone or 3,4-dihydroxytoluene) as a cocatalyst (promoter).