Synthesis of <sup>18</sup>F-Labeled Aryl Fluorosulfates via Nucleophilic Radiofluorination
作者:Young-Do Kwon、Min Ho Jeon、Nam Kyu Park、Jeong Kon Seo、Jeongmin Son、Young Hoon Ryu、Sung You Hong、Joong-Hyun Chun
DOI:10.1021/acs.orglett.0c01868
日期:2020.7.17
first SO2F2-free synthesis of aryl [18F]fluorosulfates from both phenolic and isolated aryl imidazylate precursors with cyclotron-produced 18F–. The radiochemical yields ranged from moderate to good with excellent functional group tolerance. The reliability of our approach was validated by the automated radiosynthesis of 4-acetamidophenyl [18F]fluorosulfate.
硫酰氟气体是SO 2 F转移的关键试剂。然而,由于无法获得气态[ 18 F] SO 2 F 2,传统的SO 2 F转移反应具有局限性的18 F-放射化学转化。在此,我们报告了使用回旋加速器生产的18 F –酚和分离的芳基亚氨基磺酸酯前体,首次合成无SO 2 F 2的芳基[ 18 F]氟代硫酸盐–。放射化学收率范围从中等到良好,且具有出色的官能团耐受性。我们的方法的可靠性通过4-乙酰氨基苯基[ 18 F]氟硫酸盐的自动放射合成得到了验证。
Palladium-Catalyzed Mono-α-Arylation of Acetone with Aryl Imidazolylsulfonates
作者:Lutz Ackermann、Vaibhav P. Mehta
DOI:10.1002/chem.201201394
日期:2012.8.13
Set the ace(tone): A palladium catalyst derived from the bidentate XantPhos ligand and Pd(OAc)2 has enabled broadly applicable mono‐α‐arylations of acetone to be performed with air‐ and moisture‐stable arylimidazolylsulfonates as most user‐friendly electrophiles (see scheme).
A catalytic system comprised of Pd(OAc)2 and bidentate ligand dppe enabled first direct arylations with moisture-stable aryl sulfamates as electrophiles, and proved applicable to unprecedented C−H bond functionalizations with easily accessible alkenyl phosphates as well as benzyl phosphates.
Copper-free palladium-catalyzed Sonogashira and Hiyama cross-couplings using aryl imidazol-1-ylsulfonates
作者:Steven J. Shirbin、Berin A. Boughton、Steven C. Zammit、Shannon D. Zanatta、Sebastian M. Marcuccio、Craig A. Hutton、Spencer J. Williams
DOI:10.1016/j.tetlet.2010.03.110
日期:2010.6
Aryl imidazylates are effective electrophilic partners in copper-free palladium-catalyzed Hiyama and Sonogashira cross-coupling reactions. The Sonogashira cross-coupling of estron-3-yl imidazylate afforded the corresponding phenylacetylene derivative in excellent yield. (C) 2010 Elsevier Ltd. All rights reserved.
Imidazolylsulfonates: Electrophilic Partners in Cross-Coupling Reactions
作者:Jennifer Albaneze-Walker、Ravinder Raju、Jennifer A. Vance、Andrew J. Goodman、Michael R. Reeder、Jing Liao、Mathew T. Maust、Patrick A. Irish、Peter Espino、David R. Andrews
DOI:10.1021/ol802381k
日期:2009.4.2
Arylimidazolylsulfonates participate as electrophilic coupling partners in palladium-mediated cross-coupling reactions. The arylimidazolylsulfonates display good stability while maintaining good reactivity in a variety of palladium-catalyzed coupling reactions. Imidazolylsulfonates are a practical and economic alternative to triflates.