Versatile direct dehydrative approach for diaryliodonium(iii) salts in fluoroalcohol media
作者:Toshifumi Dohi、Motoki Ito、Koji Morimoto、Yutaka Minamitsuji、Naoko Takenaga、Yasuyuki Kita
DOI:10.1039/b708802g
日期:——
We have found that the use of fluoroalcohol media greatly enhanced the efficiency and scope of the direct dehydrative condensation of arenes1 and hypervalent iodine(III) compounds; the present clean method has a broad range of applicability as well as unique selectivity in the aromatic substrates, and is highly efficient even in polymer functionalization.
Synthesis of Oxazolidinones by a Hypervalent Iodine Mediated Cyclization of
<i>N</i>
‐Allylcarbamates
作者:Mirdyul Das、Arantxa Rodríguez、Pui Kin Tony Lo、Wesley J. Moran
DOI:10.1002/adsc.202001451
日期:2021.3.16
The preparation of oxazolidinones by the hypervalentiodinemediatedcyclization of allylcarbamates is described. A versatile range of substrates can be converted into substituted oxazolidinones primed for further transformations. Derivatization of the products at both ends is demonstrated. A preliminary attempt at the enantioselective formation of an oxazolidinone using a chiral iodane is also presented
Hypervalent iodine(III): selective and efficient single-electron-transfer (SET) oxidizing agent
作者:Toshifumi Dohi、Motoki Ito、Nobutaka Yamaoka、Koji Morimoto、Hiromichi Fujioka、Yasuyuki Kita
DOI:10.1016/j.tet.2009.10.040
日期:2009.12
ethers, affording the corresponding aromatic cation radicals. Since then, hypervalent iodine(III) has been utilized as a selective and efficient SET oxidizingagent that enables a variety of direct C–H functionalizations of aromatic rings in electron-rich arenes under mild conditions. We have now extended the original method to work in a series of heteroaromatic compounds such as thiophenes, pyrroles,
Enhanced Reactivity of [Hydroxy(tosyloxy)iodo]benzene in Fluoroalcohol Media. Efficient Direct Synthesis of Thienyl(aryl)iodonium Salts
作者:Motoki Ito、Chieko Ogawa、Nobutaka Yamaoka、Hiromichi Fujioka、Toshifumi Dohi、Yasuyuki Kita
DOI:10.3390/molecules15031918
日期:——
this manuscript, we report clear evidence for the generation of aromatic cationradicals produced by using [hydroxy(tosyloxy)iodo]benzene (HTIB) in fluoroalcohol solvents such as 2,2,2-trifluoroethanol (TFE) and 1,1,1,3,3,3-hexafluoro-2-propanol (HFIP). The single-electron-transfer (SET) oxidation ability of HTIB to give cationradicals was first established by ESR and UV measurements. The reaction
A General and Convenient Preparation of [Bis(trifluoroacetoxy)iodo]perfluoroalkanes and [Bis(trifluoroacetoxy)iodo]arenes by Oxidation of Organic Iodides Using Oxone and Trifluoroacetic Acid
作者:Aleksandra A. Zagulyaeva、Mekhman S. Yusubov、Viktor V. Zhdankin
DOI:10.1021/jo902733f
日期:2010.3.19
[Bis(trifluoroacetoxy)iodo]perfluoroalkanes CnF2n+1I(OCOCF3)2 (n = 4, 6, 8, 10, 12) can be conveniently prepared by the oxidation of the corresponding perfluoroalkyl iodides with Oxone in trifluoroacetic acid at room temperature and subsequently converted to the stable [hydroxy(tosyloxy)iodo]perfluoroalkanes, CnF2n+1I(OH)OTs, by treatment with p-toluenesulfonic acid. This general and convenient procedure
[双(三氟乙酰氧基)碘]全氟烷烃C n F 2 n +1 I(OCOCF 3)2(n = 4、6、8、10、12 )可以方便地通过在三氟乙酸中用过氧化物氧化相应的全氟烷基碘化物来制备。然后在室温下用对甲苯磺酸处理,将其转化为稳定的[羟基(甲苯磺酰氧基)碘]全氟烷烃C n F 2 n +1 I(OH)OTs 。该通用且方便的方法已进一步扩展到各种[双(三氟乙酰氧基)碘]芳烃ArI(OCOCF 3)2的合成。