Tert-Butyl nitrite → 5-[4-(2,2,6,6-Tetramethylpiperidin-1-yloxy)-phenyl]-2-(2-hydroxy-3-alpha-cumyl-5-tert-octylphenyl)-2H-benzotriazole

Beteiligte Stoffe

Reaktionsschritte

The title compound is prepared reacting 0.59 g (3.75 mmol) of 1-oxyl-2,2,6,6-tetra-methylpiperidine, 1.0 g (10 mmol) of tert-butyl nitrite, 2.3 mg (0.0037 mmol) of (S,S)-(+)-N,N-bis(3,5-di-tert-butylsalicylidene)-1,2-cyclohexanediaminocobalt(II), 120 mL of pyridine and 24.0 g (75 mmol) of 5-(4-aminophenyl)-2-(2-hydroxy-3-α-cumyl-5-tert-octylphenyl)-2H-benzotriazole, prepared in Example 17, in 10 mL of pyridine at 70° C. The crude product obtained is purified by vacuum flash chromatography (2% ethyl acetate/heptane) to give 2.20 g of the title compound as a colorless oil in 87.3% yield. M/S [M+1] 673

Herkunft & Nachweise