Cerium complexes with acetato acylbis(pyrazolinone) ligands as an efficient catalyst for the oxidation of cresols by molecular oxygen

✍ Scribed by Tadatsugu Yoshikuni

• Publisher: Elsevier Science
• Year: 2002
• Tongue: English
• Weight: 86 KB
• Volume: 187
• Category: Article
• ISSN: 1381-1169
• DOI: 10.1016/s1381-1169(02)00053-5

✦ Synopsis

The catalytic use of cerium complexes with acetato o-phthaloylbis (1,3-dimethyl-2-pyrazolin-5-one) ligands produced an 88% yield of 3,5-dimethoxy-4-hydroxybenzaldehyde for the oxidation of 3,5-dimethoxycresols by molecular oxygen even in 25% methanolic aqueous solution. The desired compound was obtained up to a 94% yield by increasing the concentration of the substrate or using a 1-propanol aqueous solution.