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,
Direct Synthesis of Bipyrroles Using Phenyliodine Bis(trifluoroacetate) with Bromotrimethylsilane
作者:Toshifumi Dohi、Koji Morimoto、Akinobu Maruyama、Yasuyuki Kita
DOI:10.1021/ol060333m
日期:2006.5.1
[reaction: see text] The hypervalent iodine(III) reagent, phenyliodinebis(trifluoroacetate) (PIFA), mediates the unprecedented, oxidative coupling reaction of pyrroles to give alpha-linked bipyrroles selectively in the presence of bromotrimethylsilane. This straightforward synthesis could provide 2,3'-bipyrrole by the choice of a N-substituent of pyrrole. Mechanistic consideration of the present reaction
作者:Nazarii Sabat、Weiping Zhou、Vincent Gandon、Xavier Guinchard、Guillaume Vincent
DOI:10.1002/anie.202204400
日期:2022.7.25
Direct dearomative C3-functionalization of indoles provided access to privileged scaffolds by an umpolung strategy. Against all odds, C3-indolium intermediates could be generated from NH-indoles under operationally simple conditions with triflic acid at room temperature to promote intra- and intermolecular C3-regioselective hydroarylation. DFT studies suggest that these cationic or dicationic intermediates