Retraction Cite This: ACS Catal. 2018, 8, 9847−9847
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Retraction of “Heterogeneous Titania-Photoredox/Nickel Dual Catalysis: Decarboxylative Cross-Coupling of Carboxylic Acids with Aryl Iodides” Christopher D. McTiernan, Xavier Leblanc, and Juan C. Scaiano* ACS Catal. 2017, 7 (3), 2171−2175, DOI: 10.1021/acscatal.6b03687 he authors retract this article based on recent findings that our products were incorrectly identified and thus one of the key conclusions of the article is not valid. The incorrectly reported (III) product and now verified major (IV) product are shown in Scheme 1 for the key reaction in our publication. Both products have very similar NMR spectra and MS fragmentation pattern, which contributed to our mistake.
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Scheme 1. Dual Catalysis, Showing the Incorrectly Reported (III) and Now Corrected (IV) Product
Using Electrospray Ionization Mass Spectrometry (ESI-MS) we were able to establish that the problem of Scheme 1 above also applies to the following compounds in Tables 2 and 3 of our original publication: 17 and 25−36. All other molecules were also tested, but the ESI-MS results were not conclusive. However, it would appear that the correction presented in Scheme 1 may be quite general. While decarboxylation fails under dual-catalysis conditions, it is noteworthy that I decarboxylates readily with TiO2 and UVA light in acetonitrile or acetonitrile:water. We are grateful to Professors Peter H. Seeberger and Bartholomäus Pieber for bringing to our attention possible inconsistencies with the products we reported and to Drs. Anabel E. Lanterna and Bowen Wang for performing the measurements required to support the correct product identification. The original article was published on February 17, 2017 and retracted on October 5, 2018.
Published: October 5, 2018 © 2018 American Chemical Society
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DOI: 10.1021/acscatal.8b03510 ACS Catal. 2018, 8, 9847−9847
