Photochemical study of substituted s-triazines

✍ Scribed by L. Douarre; R. Arnaud; J. Lemaire; A. Deflandre; H. Richard

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 538 KB
• Volume: 96
• Category: Article
• ISSN: 1010-6030
• DOI: 10.1016/1010-6030(95)04271-7

✦ Synopsis

A study of the photochemical behaviour of three substituted s-triazines with low photoreactivity has been carried out. The photoproducts I )rmed via irradiation at A > 300 nm of solutions of s-triazines substituted by 4-amino benzylidene camphor (TABC), 4-amino diisobutyl tenzal malonate (TBMA) or 4-amino-2-ethyl hexyl benzoate (TPAB) in methanol under aerated conditions have been identified. In methanol tae direct irreversible phototransformation quantum yields are very low (10-4-10-6).

The irradiation of the compound TABC leads to an aldehyde function attached to a position para to the aromatic ring by oxidative scission ~ f the conjugated ethylenic bond. In the case of the compound TPAB the scission of an NH-~ bond gives a photoproduct with a primary ~ mino group attached to the s-triazine. The irradiation of the compound TBMA provokes the scission of the conjugated ethylenic bond, 1 ~:ading to an aldehyde function. In this case a tautomeric form of the initial molecule has also been proposed.