Xenon Difluoride Mediated Fluorodecarboxylations for the Syntheses of Di- and Trifluoromethoxyarenes
作者:Claire Chatalova-Sazepin、Meruyert Binayeva、Maxim Epifanov、Wei Zhang、Paul Foth、Carolyn Amador、Manu Jagdeo、Benjamin R. Boswell、Glenn M. Sammis
DOI:10.1021/acs.orglett.6b02208
日期:2016.9.16
Selectfluor in fluorodecarboxylations of both mono- and difluoroaryloxy acetic acid derivatives. This method efficiently converts a wide range of neutral and electron-poor substrates to afford the desired di- and trifluoromethyl aryl ethers in good to excellent yields. The purifications are facile, and the reaction times are less than 5 min, which makes these fluorodecarboxylations promising for future PET-imaging
Photo-fluorodecarboxylation of 2-Aryloxy and 2-Aryl Carboxylic Acids
作者:Joe C. T. Leung、Claire Chatalova-Sazepin、Julian G. West、Montserrat Rueda-Becerril、Jean-François Paquin、Glenn M. Sammis
DOI:10.1002/anie.201206352
日期:2012.10.22
<sup>18</sup>
F‐Labeling of Aryl‐SCF
<sub>3</sub>
, ‐OCF
<sub>3</sub>
and ‐OCHF
<sub>2</sub>
with [
<sup>18</sup>
F]Fluoride
作者:Tanatorn Khotavivattana、Stefan Verhoog、Matthew Tredwell、Lukas Pfeifer、Samuel Calderwood、Katherine Wheelhouse、Thomas Lee Collier、Véronique Gouverneur
DOI:10.1002/anie.201504665
日期:2015.8.17
AbstractWe report that halogenophilic silver(I) triflate permits halogen exchange (halex) nucleophilic 18F‐fluorination of aryl‐OCHFCl, ‐OCF2Br and ‐SCF2Br precursors under mild conditions. This AgI‐mediated process allows for the first time access to a range of 18F‐labeled aryl‐OCHF2, ‐OCF3 and ‐SCF3 derivatives, inclusive of [18F]riluzole. The 18F‐labeling of these medicinally important motifs expands the radiochemical space available for PET applications.
Synthesis and Reactivity of <sup>18</sup>F-Labeled α,α-Difluoro-α-(aryloxy)acetic Acids
作者:Tanatorn Khotavivattana、Samuel Calderwood、Stefan Verhoog、Lukas Pfeifer、Sean Preshlock、Neil Vasdev、Thomas L. Collier、Véronique Gouverneur
DOI:10.1021/acs.orglett.6b03730
日期:2017.2.3
In this work, we describe the 18F-labeling of α,α-difluoro-α-(aryloxy)aceticacid derivatives and demonstrate that these building blocks are amenable to post-18F-fluorination functionalization. Protodecarboxylation offers a new entry to 18F-difluoromethoxyarene, and the value of this approach is further demonstrated with coupling processes leading to representative 18F-labeled TRPV1 inhibitors and