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Regioselective iodination of chlorinated aromatic compounds using silver salts
Journal article   Open access   Peer reviewed

Regioselective iodination of chlorinated aromatic compounds using silver salts

Sudhir N Joshi, Sandhya M Vyas, Huimin Wu, Michael W Duffel, Sean Parkin and Hans-Joachim Lehmler
Tetrahedron, Vol.67(39), pp.7461-7469
2011
DOI: 10.1016/j.tet.2011.07.064
PMCID: PMC3170769
PMID: 21918585
url
https://www.ncbi.nlm.nih.gov/pmc/articles/3170769View
Open Access

Abstract

The iodination of chlorinated aromatic compounds using Ag 2SO 4/I 2, AgSbF 6/I 2, AgBF 4/I 2, and AgPF 6/I 2 offers access to iodoarenes that are valuable intermediates in organic synthesis. Specifically, iodination of phenols, anisoles, and anilines with a 3,5-dichloro substitution pattern preferentially yielded the ortho, para, and para iodinated product, respectively. In the case of chlorobenzene and 3-chlorotoluene, AgSbF 6/I 2, AgBF 4/I 2, and AgPF 6/I 2, but not Ag 2SO 4/I 2, selectively introduced the iodine in para position to the chlorine substituent. [Display omitted]
Chlorobenzene Phenol Silver tetrafluoroborate Silver sulfate Aniline 3-Chlorotoluene Silver hexafluorophosphate Silver hexafluoroantimonate Anisole Non-coordinating ions

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