Mild and efficient synthesis of iodylarenes using Oxone as oxidant
作者:Natalia Soldatova、Pavel Postnikov、Anna A. Troyan、Akira Yoshimura、Mekhman S. Yusubov、Viktor V. Zhdankin
DOI:10.1016/j.tetlet.2016.08.038
日期:2016.9
Mild and efficientmethod for the preparation of iodylarenes by oxidation of iodoarenes with Oxone in aqueous acetonitrile at room temperature is described. This new procedure allows the preparation of various iodylarenes with electron-donating or electron-withdrawing substituents in the aromatic ring including the previously unknown 1,2-diiodylbenzene.
(diacetoxyiodo)-arenes, ArI(OAc)2, or iodylarenes, ArIO2, from the corresponding iodoarenes, ArI, using sodium periodate as the oxidant are presented in this paper. In order to obtain 2- and 4-iodylbenzoic acids, the respective sodium salts of 2- and 4-iodobenzoic acids should be used as the starting substrates, because mixtures containing the corresponding iodosyl derivatives as the main products
Iodylbenzene derivatives substituted with electron donating as well as electron withdrawing groups on the aromatic ring are used as precursors in aromatic nucleophilic substitution reactions. The iodyl group (IO
2
) is regiospecifically substituted by nucleophilic fluoride to provide the corresponding fluoroaryl derivatives. No-carrier-added [F-18]fluoride ion derived from anhydrous [F-18](F/Kryptofix, [F-18]CsF or a quaternary ammonium fluoride (e.g., Me
4
NF, Et
4
NF, n-Bu
4
NF, (PhCH
2
)
4
NF) exclusively substitutes the iodyl moiety in these derivatives and provides high specific activity F-18 labeled fluoroaryl analogs. Iodyl derivatives of a benzothiazole analog and 6-iodyl-L-dopa derivatives have been synthesized as precursors and have been used in the preparation of no-carrier-added [F-18]fluorobenzothiazole as well as 6-[F-18]fluoro-L-dopa.
Simple and efficient palladium-catalyzed carbonylation of iodoxyarenes in water under mild conditions
作者:Vladimir V. Grushin、Howard Alper
DOI:10.1021/jo00070a008
日期:1993.8
Iodoxyarenes (ArIO2) readily react with CO (1 atm) in water, in the presence of Na2[PdCl4] (0.1%) and Na2CO3 at 40-50-degrees-C, to give the corresponding carboxylic acids, ArCOOH, in 55-89% isolated yield. Particularly attractive features of the reaction are that, unlike most iodoarenes, ArIO2 can be carbonylated in aqueous media without any organic solvents, due to their solubility in water and high reactivity.
245. Organic compounds of multivalent iodine. Part I. Infrared spectra