Oxidation of 2,6-di-tert-butylphenol with polymer anchored molybdenyl and vanadyl complexes

✍ Scribed by Rita Pathak; G.N. Rao

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 79 KB
• Volume: 130
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(97)00215-x

✦ Synopsis

Ž t . Ž . The oxidation of 2,6-di-tert-butylphenol with tert-butylhydroperoxide Bu O H has been studied using polymer XAD 2 4

anchored salicylaldoxime, 1,3-propylene-bis-salicylaldimine and o-phenylene-bis-salicylaldimine complexes of molybdenum and vanadium in acetonitrile. The predominant products formed in the oxidation reactions were 2,6-di-tert-butylben-Ž .

X X

Ž . zoquinone BQ and 3,3 -5,5 -tetra-tert-butyldiphenoquinone dPQ , whereas with some only 2,6-di-tert-butylbenzoquinone was formed. This is the first reported use of polymer anchored molybdenyl and vanadyl complexes in selective oxidation of 2,6-di-tert-butylphenol. Solvent plays an important role in this reaction. The effects of varying the ligand, metal and the support on the catalytic activity in the oxidation of 2,6-di-tert-butylphenol have been studied. With polymer anchored Ž . MoO salpen , 81% of 2,6-di-tert-butylbenzoquinone was formed from 2,6-di-tert-butylphenol. q 1998 Elsevier Science 2 B.V.