Synthesis 2023; 55(17): 2730-2736
DOI: 10.1055/a-2085-3284
paper

Synthesis and Evaluation of Fluorous-Tagged and Polystyrene-Supported Precursors for Fluoro-benziodoxole

a   Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, Ontario, Canada, N2L 3G1, Canada
b   Department of Chemistry and Biochemistry, McMaster University, 1280 Main St. West, Hamilton, Ontario, Canada, L8S 4M3, Canada
,
b   Department of Chemistry and Biochemistry, McMaster University, 1280 Main St. West, Hamilton, Ontario, Canada, L8S 4M3, Canada
,
a   Department of Chemistry, University of Waterloo, 200 University Ave W., Waterloo, Ontario, Canada, N2L 3G1, Canada
› Institutsangaben
This work was funded by the Natural Sciences and Engineering Research Council (NSERC) of Canada (DG 2019-04086), the Ontario Ministry of Research and Innovation (ERA ER15-11-193), and the University of Waterloo.


Abstract

Fluoro-benziodoxole, a fluorinated hypervalent iodine (HVI) reagent, has been prepared by fluoride exchange with fluorous- or polystyrene-based sulfonyloxy-benziodoxole precursors. Key to this strategy was the facile O-sulfonylation of a common hydroxy-benziodoxole precursor with sulfonyl chlorides, which enabled the easy synthesis and evaluation of previously unknown fluorous- or polystyrene-based fluoride exchange precursors. Fluorination of a fluorous-tagged iodane led to fluoro-benziodoxole in 67% yield in 10 minutes with TBAF, whereas fluoride exchange on the polystyrene-supported iodane led to the fluoro-benziodoxole in 82 ± 5% yield upon reacting with TBAF for 10 minutes.

Supporting Information



Publikationsverlauf

Eingereicht: 28. März 2023

Angenommen: 03. Mai 2023

Accepted Manuscript online:
03. Mai 2023

Artikel online veröffentlicht:
24. Mai 2023

© 2023. Thieme. All rights reserved

Georg Thieme Verlag KG
Rüdigerstraße 14, 70469 Stuttgart, Germany