Green oxidations. The use of potassium permanganate supported on manganese dioxide

Shaabani, Ahmad; Mirzaei, Peiman; Naderi, Soheila; Lee, Donald G.

doi:10.1016/j.tet.2004.09.087

Cited by 142 publications

(46 citation statements)

References 11 publications

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“…Communications 5182 www.angewandte.org (20) as a colorless liquid (32 mg, 49 %) and xanthone [20] Computational methods: Structures were optimized with the gradient-corrected BP86 functional. [21] Systems involving the iodine atom employed a large-core, quasi-relativistic, effective core potential [22] with the associated (16s11p6d)/[9s6p1d] valence basis set; all other atoms were described with the def2-TZVP basis set.…”

Section: Methodsmentioning

confidence: 99%

The Generation of Aryl Anions by Double Electron Transfer to Aryl Iodides from a Neutral Ground‐State Organic Super‐Electron Donor

et al. 2007

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Section: Methodsmentioning

confidence: 99%

The Generation of Aryl Anions by Double Electron Transfer to Aryl Iodides from a Neutral Ground‐State Organic Super‐Electron Donor

et al. 2007

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“…Methodologies in the synthesis of xanthones through the xanthene framework (Scheme 2, h)) have also been investigated [88][89][90][91]. Green oxidations under heterogeneous or solvent-free conditions, by potassium permanganate supported on manganese dioxide (Scheme 11 a)) [88,91] or montmorillonite K10 [89], were used effectively for the oxidation of xanthene (41) and its conversion into xanthone (42) at room temperature.…”

Section: New Approaches To the Synthesis Of The Xanthonic Tricyclic Smentioning

confidence: 99%

Synthesis of Xanthones: An Overview

Sousa¹,

Pinto

2005

CMC

125

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Among the known synthetic routes to obtain xanthones, the Grover, Shah, and Shah reaction, the cyclodehydration of 2, 2'-dihydroxybenzophenones and electrophilic cycloacylation of 2-aryloxybenzoic acids are the most popular methods. Due to important biological applications of xanthones, some synthetic strategies leading to more complex derivatives have been widely explored in the past years. Thus, the purpose of this review is to report some recent improvements of the classical synthetic methods as well as of some non-classical methods to obtain simple oxygenated xanthones. The strategies for introduction of substituents into the xanthonic nucleus are also summarized. Furthermore, different approaches used to synthesize complex structures, with an emphasis on the total synthesis of bioactive natural products, accomplished in the last twenty years, are also discussed. Besides the synthesis of xanthones, the reactivity of the xanthonic nucleus and its role as a key intermediate for the synthesis of other important classes of compounds are also highlighted.

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“…In previous papers 14, 15 we have shown that a recyclable byproduct can be obtained if activated manganese dioxide is used as a solid support for potassium permanganate. In this paper, we wish to report additional progress on this procedure.…”

Section: Methodsmentioning

confidence: 98%

Cleavage of Oximes, Semicarbazones, and Phenylhydrazones with Supported Potassium Permanganate

Shaabani¹,

Naderi²,

Rahmati³

et al. 2005

Synthesis

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Potassium permanganate supported on manganese(II) sulfate or activated manganese dioxide can be used effectively for the oxidative cleavage of oximes and semicarbazones under solvent-free conditions and for the cleavage of phenylhydrazones in dichloromethane. The residue that remains after extraction of the organic products, primarily manganese oxides, can be recycled, making the process, in theory, infinitely sustainable.

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Green oxidations. The use of potassium permanganate supported on manganese dioxide

Cited by 142 publications

References 11 publications

The Generation of Aryl Anions by Double Electron Transfer to Aryl Iodides from a Neutral Ground‐State Organic Super‐Electron Donor

The Generation of Aryl Anions by Double Electron Transfer to Aryl Iodides from a Neutral Ground‐State Organic Super‐Electron Donor

Synthesis of Xanthones: An Overview

Cleavage of Oximes, Semicarbazones, and Phenylhydrazones with Supported Potassium Permanganate

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