Reaktion #93231

Reaktionsgleichung

Methacrylyl chloride

triethylamine

2-(2'-hydroxy-5'-hydroxypropyl-3'-tert-butylphenyl)-5-chloro-2H-benzotriazole

→

2-(2'-Hydroxy-5'-methyacrylyloxypropyl-3'-tert-butylphenyl)-5-chloro-2H-benzotriazole

Lösungsmittel

methylene chloride

methylene chloride

Reaktionsbedingungen

Aufarbeitung

1. 1
   Waschenwashed with 1N hydrochloric acid and water
2. 2
   TrocknenThe methylene chloride solution of the product was dried with sodium sulfate
3. 3
   Sonstigeevaporated
4. 4
   SonstigeA polymerization grade sample was obtained by recrystallization from methanol

Vorschrift

Methacrylyl chloride (5.9 ml) and triethylamine (8.5 ml) were added dropwise at -5° C. to a solution of 2-(2'-hydroxy-5'-hydroxypropyl-3'-tert-butylphenyl)-5-chloro-2H-benzotriazole (20 g) in 250 ml of methylene chloride. The reaction mixture was stirred at 0° C. overnight and then washed with 1N hydrochloric acid and water. The methylene chloride solution of the product was dried with sodium sulfate, passed through alumina column and evaporated. The crude yield of the product was 22 g (90%). A polymerization grade sample was obtained by recrystallization from methanol--methylene chloride mixture, m.p. 74.5°-76.5° C.

Quelle