2-Iodoxybenzoic acid organosulfonates: preparation, X-ray structure and reactivity of new, powerful hypervalent iodine(v) oxidants
作者:Mekhman S. Yusubov、Dmitrii Yu. Svitich、Akira Yoshimura、Victor N. Nemykin、Viktor V. Zhdankin
DOI:10.1039/c3cc47090c
日期:——
Newpowerful hypervalent iodine(V) oxidants, tosylate and mesylate derivatives of 2-iodoxybenzoic acid (IBX), were prepared by the reaction of IBX with the corresponding sulfonic acids. Single crystal X-ray crystallography of the diacetate derivative of IBX-tosylate revealed an unusual heptacoordinated iodine geometry without any significant intermolecular secondary interactions.
A highly anti‐Markovnikov selective oxidation of alkenes based on in situ generated hypoiodite catalysis in aqueous micellar media under mild conditions has been described. This novel catalytic system realizes an efficient synthesis of aldehydes from alkenes in an economically viable and environmentally safe fashion. The preliminary mechanistic studies suggest that the reaction proceeds via tandem
CATALYTIC ANTI-MARKOVNIKOV OXIDATION AND HYDRATION OF OLEFINS
申请人:Dong Guangbin
公开号:US20120172634A1
公开(公告)日:2012-07-05
The disclosure provides a dual-catalysis system for direct conversion of olefins to alcohols. The cooperative catalytic system contains one oxidizing catalyst and one transfer-hydrogenation catalyst. A wide variety of olefins, including aromatic and aliphatic olefins, can be used as the reactant. The transformation proceeds with anti-Markovnikov selectivity, and in some aspects provides primary alcohols as major products. The disclosure further provides a system for oxidation of olefins with anti-Markovnikov selectivity.
Oligomeric Iodosylbenzene Sulfate: A Convenient Hypervalent Iodine Reagent for Oxidation of Organic Sulfides and Alkenes
作者:Mehman Yusubov、Viktor Zhdankin、Rosa Yusubova、Tatyana Funk、Ki-Whan Chi
DOI:10.1055/s-0029-1216870
日期:2009.8
Oligomeric iodosylbenzene sulfate, (PhIO)3˙SO3, which can be formally considered as a partially depolymerized activated iodosylbenzene, is a readily available, stable, and water-soluble hypervalent iodine reagent that is useful for the oxidation of sulfides or alkenes. Furthermore, this reagent can be conveniently generated in situ from (diacetoxyiodo)benzene and sodium bisulfate and used without isolation
低聚亚碘酰苯硫酸根,(PhIO)3 SO 3形式上可以被认为是部分解聚的活化碘代苯,是一种易于获得,稳定且水溶性的高价碘试剂,可用于硫化物或烯烃的氧化。此外,该试剂可以方便地从(二乙酰氧基碘)苯和硫酸氢钠原位产生,并且无需在水溶液中或在无溶剂条件下进行氧化分离就可以使用。碘代碘代苯硫酸盐在室温下与有机硫化物原位反应可提供高收率的亚砜,而不会过度氧化成砜,并且该反应与底物分子中存在羟基,双键,苄基碳原子,羧酸酯基团相容以及各种取代的苯环。 氧化-碘-亚砜-碘基苯-(二乙酰氧基碘)苯-高价碘
Facile preparation and reactivity of bifunctional ionic liquid-supported hypervalent iodine reagent: a convenient recyclable reagent for catalytic oxidation
作者:Chenjie Zhu、Akira Yoshimura、Yunyang Wei、Victor N. Nemykin、Viktor V. Zhdankin
DOI:10.1016/j.tetlet.2012.01.053
日期:2012.3
efficient, and recyclable bifunctional catalysts bearing ionic liquid supported (2,2,6,6-tetramethylpiperidin-1-yl)oxyl (TEMPO) and iodoarene moieties were developed and used for environmentally benign catalytic oxidation of alcohols. The reactions using peracetic acid as a green and practical co-oxidant afforded the corresponding carbonyl compounds in high yields under mild conditions and convenient work-up