Recyclable Magnetic Nanoparticle‐Supported Iodoarene Catalysts for Oxidation of 4‐Alkoxyphenols to Quinones. Issue 4 (16th February 2016)

• Record Type: Journal Article
• Authors: Nambu, Hisanori; Shimokawa, Ikumi; Fujiwara, Tomoya; Yakura, Takayuki
• Is Part Of: Asian journal of organic chemistry. Volume 5:Issue 4(2016)
• Page Start: 486
• Page End: 489
• Publication Date: 2016-02-16
• Subjects: alkoxyphenols -- hypervalent iodine -- magnetic nanoparticles -- oxidation -- quinones; Chemistry, Organic -- Periodicals; Organic compounds -- Synthesis -- Periodicals; 547.005
• DOI: 10.1002/ajoc.201600036
• Languages: English
• ISSNs: 2193-5807

Abstract

Abstract: Iodoarene catalysts immobilized on magnetite (Fe3 O4 ) were developed. The reactivity of catalysts 4 a and 4 b were similar to that of 4‐iodophenoxyacetic acid (3 ) for the oxidation of 4‐alkoxyphenols in the presence of Oxone ® as a co‐oxidant to give the corresponding p ‐quinones in high yields. In addition, 4 b was readily recovered by the use of an external magnet and was recycled up to eight times. This is the first example of a magnetic, nanoparticle‐supported iodoarene catalyst. Abstract : Drawn to it like a magnet : The reactivity of iodoarene catalysts immobilized on magnetite (Fe3 O4 ) were similar to that of 4‐iodophenoxyacetic acid for the oxidation of 4‐alkoxyphenols in the presence of Oxone ® as a co‐oxidant to give the corresponding p ‐quinones in high yields. These catalysts were readily recovered by the use of an external magnet and were recycled up to eight times.