NEW ROUTE TO THE SYNTHESIS OF 2-(2-HYDROXY-3-VINYL-5-METHYLPHENYL)-2H-BENZO-TRIAZOLE

Many polymers tend to degrade on prolonged exposure to ultraviolet light, and many classes of compounds, collectively referred to as 'UV stabilizers', have been examined as additives to such polymers in attempts to improve the resistance of the polymers to degradation by ultraviolet light. It is known that compounds that comprise the 2-(2-hydroxyphenyl)benzotriazole group are particularly useful as UV stabilizers. We have now devised a simple three-step process for the preparation of 2-(vinylhydroxyphenyl)benzotriazoles.