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,
[EN] METHODS FOR MAKING BACTERIOCHLORIN MACROCYCLES COMPRISING AN ANNULATED ISOCYCLIC RING AND RELATED COMPOUNDS<br/>[FR] PROCÉDÉS DE FABRICATION DE MACROCYCLES BACTÉRIOCHLORINES COMPRENANT UN NOYAU ISOCYCLIQUE ANNELÉ ET DES COMPOSÉS APPARENTÉS
申请人:UNIV NORTH CAROLINA STATE
公开号:WO2018102252A1
公开(公告)日:2018-06-07
Described herein are bacteriochlorins comprising an annulated isocyclic ring. Also described are methods and intermediates for the synthesis of bacteriochlorins comprising an annulated isocyclic ring, and methods of using such bacteriochlorins for, among other things, diagnostic and therapeutic purposes such as, e.g., luminescent compounds in flow cytometry, and/or as active agents in photodynamic therapy (PDT).
Construction of the Bacteriochlorin Macrocycle with Concomitant Nazarov Cyclization To Form the Annulated Isocyclic Ring: Analogues of Bacteriochlorophyll <i>a</i>
作者:Shaofei Zhang、Jonathan S. Lindsey
DOI:10.1021/acs.joc.6b02878
日期:2017.3.3
propenone bearing the two halves (a hydrobilin analogue). Subsequent treatment (0.2 mM) with acid (Yb(OTf)3, CH3CN, 80 °C) promotes a double ring-closure process: (i) condensation between the α-position of pyrrole ring A and the α-acetal unit attached to pyrroline ring B forms the bacteriochlorin macrocycle, and (ii) Nazarov cyclization of the β-(propenoyl)-substituted ring C forms the isocyclic ring (E)
Novel and Direct Oxidative Cyanation Reactions of Heteroaromatic Compounds Mediated by A Hypervalent Iodine(III) Reagent
作者:Toshifumi Dohi、Koji Morimoto、Yorito Kiyono、Hirofumi Tohma、Yasuyuki Kita
DOI:10.1021/ol0476826
日期:2005.2.1
The hypervalent iodine(III) reagent phenyliodine bis(trifluoroacetate) (PIFA) mediates the selective cyanation reactions of a wide range of electron-rich heteroaromatic compounds such as pyrroles, thiophenes, and indoles under mild conditions. These reactions proceed via a cation radical intermediate, and the key for the successful transformation presumably depends on the oxidation-reduction potential
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