Isooctan-1-ol → Octyl 3-(3-(2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyphenyl)propanoate

Beteiligte Stoffe

Reaktionsbedingungen

Reaktionsschritte

Methyl 3-(2H-benzotriazol-2-yl)-5-tert-butyl-4-hydroxyhydrocinnamate (353 g, 1 mol), isooctanol (260 g, 2 mol, from Exxon) and dibutyltin oxide (0.5 g, 0.002 mol) are charged to a reaction flask and heated to 175° C. While heating to 175° C., a 300 mm Hg vacuum is applied. After holding at 175° C. for 30 minutes, the excess isooctanol is distilled by slowly reducing the pressure to <5 mm Hg. The desired product is cooled and discharged. The title compound is obtained in a yield of 451 g (100%) as a light yellow oil whose structure is verified by 1Hnmr and mass spectroscopy. The non-distilled product is analyzed by ICP (Inductively Coupled Plasma) for tin and is found to contain 170 ppm of tin.

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