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Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II)

[Image: see text] The first selective coupling of a carbon nucleophile with methyl, ethyl, propyl, and butyl arenes in the absence of a directing group is described. Pd(OAc)(2) double C–H activation displays remarkable selectivity for the terminal methyl sites in alkyl arenes, rather than the more c...

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Autores principales: Curto, John M., Kozlowski, Marisa C.
Formato: Online Artículo Texto
Lenguaje:English
Publicado: American Chemical Society 2014
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4304446/
https://www.ncbi.nlm.nih.gov/pubmed/25423164
http://dx.doi.org/10.1021/ja5093166
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author Curto, John M.
Kozlowski, Marisa C.
author_facet Curto, John M.
Kozlowski, Marisa C.
author_sort Curto, John M.
collection PubMed
description [Image: see text] The first selective coupling of a carbon nucleophile with methyl, ethyl, propyl, and butyl arenes in the absence of a directing group is described. Pd(OAc)(2) double C–H activation displays remarkable selectivity for the terminal methyl sites in alkyl arenes, rather than the more commonly observed arene sp(2) C–H activation. Mechanistic studies indicate the intermediacy of an azlactone dimer, obtained from oxidation with Pd(OAc)(2), and are consistent with a Pd-catalyzed C–H activation vs a radical process. The observed reactivity establishes that typical reaction solvents (e.g., toluene) can readily participate in C–H activation chemistry.
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spelling pubmed-43044462015-11-25 Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II) Curto, John M. Kozlowski, Marisa C. J Am Chem Soc [Image: see text] The first selective coupling of a carbon nucleophile with methyl, ethyl, propyl, and butyl arenes in the absence of a directing group is described. Pd(OAc)(2) double C–H activation displays remarkable selectivity for the terminal methyl sites in alkyl arenes, rather than the more commonly observed arene sp(2) C–H activation. Mechanistic studies indicate the intermediacy of an azlactone dimer, obtained from oxidation with Pd(OAc)(2), and are consistent with a Pd-catalyzed C–H activation vs a radical process. The observed reactivity establishes that typical reaction solvents (e.g., toluene) can readily participate in C–H activation chemistry. American Chemical Society 2014-11-25 2015-01-14 /pmc/articles/PMC4304446/ /pubmed/25423164 http://dx.doi.org/10.1021/ja5093166 Text en Copyright © 2014 American Chemical Society This is an open access article published under an ACS AuthorChoice License (http://pubs.acs.org/page/policy/authorchoice_termsofuse.html) , which permits copying and redistribution of the article or any adaptations for non-commercial purposes.
spellingShingle Curto, John M.
Kozlowski, Marisa C.
Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II)
title Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II)
title_full Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II)
title_fullStr Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II)
title_full_unstemmed Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II)
title_short Chemoselective Activation of sp(3) vs sp(2) C–H Bonds with Pd(II)
title_sort chemoselective activation of sp(3) vs sp(2) c–h bonds with pd(ii)
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4304446/
https://www.ncbi.nlm.nih.gov/pubmed/25423164
http://dx.doi.org/10.1021/ja5093166
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