Title:
【発明の名称】2-(2’,4’-ジヒドロキシフェニル)-4,6-ジアリール-s-トリアジンの製造方法
Document Type and Number:
Japanese Patent JP3067878
Kind Code:
B2
Abstract:
A process is described for the preparation of 2-(2',4'-dihydroxyphenyl)-4,6-diaryl-s-triazines of the formula
which is characterised in that 2-hydroxy-4,6-diaryl-s-triazines of the formula
are reacted with thionyl chloride at a temperature of between 100 and 150 DEG C in the presence of catalytic amounts of a non-polar solvent and subsequently with 1,3-dihydroxybenzene using a Lewis acid in the presence of an inert organic solvent, it being possible for the rings A in the formulae (1) and (2) to be substituted further by halogen, hydroxyl, lower alkyl, lower alkoxy or lower alkoxycarbonyl.
The present process allows 2-(2',4'-dihydroxyphenyl)-4,6-diaryl-s-triazines which are used as UV absorbers or which represent starting compounds for UV absorbers to be prepared in a simple manner and in good yields.
Inventors:
Kurt Burdeska
Application Number:
JP1349892A
Publication Date:
July 24, 2000
Filing Date:
January 29, 1992
Export Citation:
Assignee:
Ciba Specialty Chemicals Holding Incorporated
International Classes:
B01J31/02; C07B61/00; B01J27/125; C07D251/22; C07D251/24; (IPC1-7): C07D251/24; C07D251/22
Domestic Patent References:
| JP2292267A |
Attorney, Agent or Firm:
Masao Okabe (11 others)