1-[Hydroxy(sulfonyloxy)iodo]-1<i>H</i>,1<i>H</i>-perfluoroalkanes: Stable, Fluoroalkyl Analogs of Koser's Reagent
作者:Viktor V. Zhdankin、Chris J. Kuehl、Angela J. Simonsen
DOI:10.1021/jo961336n
日期:1996.11.15
respective alpha-(tosyloxy) ketones. A similar reaction of cyclohexene furnishes cis-1,2-bis(tosyloxy)cyclohexane as the major product. Triflates 3c,f react with (trimethylsilyl)arenes under mild conditions to afford the respective (fluoroalkyl) (aryl)iodonium triflates 7, while the analogous reaction with alkynyltrimethylsilanes leads to novel (fluoroalkyl)(alkynyl)iodonium salts 8.
1- [羟基(磺酰氧基)碘] -1H,1H-全氟烷烃3 [R(f)CH(2)I(OH)OSO(2)R; R = CH(3),CF(3),p-CH(3)C(6)H(4),R(f)= CF(3),C(2)F(5)]通过用过氧三氟乙酸氧化,然后与TsOH,MsOH或Me(3)SiOTf反应,从适当的碘代氟代烷烃中分离两个步骤。甲苯磺酸酯衍生物3a在温和条件下与甲硅烷基烯醇醚反应,得到相应的α-(甲苯磺酰氧基)酮。环己烯的类似反应提供了顺式1,2-双(甲苯磺酰氧基)环己烷为主要产物。三氟甲磺酸3c,f在温和的条件下与(三甲基甲硅烷基)芳烃反应,得到相应的(氟烷基)(芳基)碘鎓三氟甲磺酸盐7,而与炔基三甲基硅烷的类似反应产生新的(氟烷基)(炔基)碘鎓盐8。
Facile Synthesis of Koser’s Reagent and Derivatives from Iodine or Aryl Iodides
作者:Eleanor A. Merritt、Vânia M. T. Carneiro、Luiz F. Silva、Berit Olofsson
DOI:10.1021/jo101227j
日期:2010.11.5
one-pot synthesis of neutral and electron-rich [hydroxy(tosyloxy)iodo]arenes (HTIBs) from iodine and arenes is presented, thereby avoiding the need for expensive iodine(III) precursors. A large set of HTIBs, including a polyfluorinated analogue, can be obtained from the corresponding aryl iodide under the same conditions. The reaction proceeds under mild conditions, without excess reagents, and is