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To “Rollover” or Not? Stereoelectronically Guided C–H Functionalization Pathways from Rhodium–Abnormal NHC Intermediates
[Image: see text] Rollover C–H activation with transition-metal complexes has been found to be a difficult but viable pathway to functionalize potentially chelating molecules, which are otherwise reluctant to react further. However, selective rollover or nonrollover C–H activation pathway depends on...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
American Chemical Society
2018
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641269/ https://www.ncbi.nlm.nih.gov/pubmed/31458483 http://dx.doi.org/10.1021/acsomega.7b01846 |
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author | Dutta, Champak Ghorai, Debasish Choudhury, Joyanta |
author_facet | Dutta, Champak Ghorai, Debasish Choudhury, Joyanta |
author_sort | Dutta, Champak |
collection | PubMed |
description | [Image: see text] Rollover C–H activation with transition-metal complexes has been found to be a difficult but viable pathway to functionalize potentially chelating molecules, which are otherwise reluctant to react further. However, selective rollover or nonrollover C–H activation pathway depends on the stereoelectronic demand of the associated organometallic intermediate(s). The presented work addresses the above issue on abnormal N-heterocyclic carbene (NHC) platform. Catalytic reactions of pyridine-imidazolium substrates with internal alkynes have been selectively guided toward either rollover or nonrollover C–H functionalization route via fulfilling the steric and electronic demands of the relevant rhodium(III)–abnormal NHC metallacyclic intermediates. |
format | Online Article Text |
id | pubmed-6641269 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | American Chemical Society |
record_format | MEDLINE/PubMed |
spelling | pubmed-66412692019-08-27 To “Rollover” or Not? Stereoelectronically Guided C–H Functionalization Pathways from Rhodium–Abnormal NHC Intermediates Dutta, Champak Ghorai, Debasish Choudhury, Joyanta ACS Omega [Image: see text] Rollover C–H activation with transition-metal complexes has been found to be a difficult but viable pathway to functionalize potentially chelating molecules, which are otherwise reluctant to react further. However, selective rollover or nonrollover C–H activation pathway depends on the stereoelectronic demand of the associated organometallic intermediate(s). The presented work addresses the above issue on abnormal N-heterocyclic carbene (NHC) platform. Catalytic reactions of pyridine-imidazolium substrates with internal alkynes have been selectively guided toward either rollover or nonrollover C–H functionalization route via fulfilling the steric and electronic demands of the relevant rhodium(III)–abnormal NHC metallacyclic intermediates. American Chemical Society 2018-02-07 /pmc/articles/PMC6641269/ /pubmed/31458483 http://dx.doi.org/10.1021/acsomega.7b01846 Text en Copyright © 2018 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 | Dutta, Champak Ghorai, Debasish Choudhury, Joyanta To “Rollover” or Not? Stereoelectronically Guided C–H Functionalization Pathways from Rhodium–Abnormal NHC Intermediates |
title | To “Rollover” or Not? Stereoelectronically
Guided C–H Functionalization Pathways from Rhodium–Abnormal
NHC Intermediates |
title_full | To “Rollover” or Not? Stereoelectronically
Guided C–H Functionalization Pathways from Rhodium–Abnormal
NHC Intermediates |
title_fullStr | To “Rollover” or Not? Stereoelectronically
Guided C–H Functionalization Pathways from Rhodium–Abnormal
NHC Intermediates |
title_full_unstemmed | To “Rollover” or Not? Stereoelectronically
Guided C–H Functionalization Pathways from Rhodium–Abnormal
NHC Intermediates |
title_short | To “Rollover” or Not? Stereoelectronically
Guided C–H Functionalization Pathways from Rhodium–Abnormal
NHC Intermediates |
title_sort | to “rollover” or not? stereoelectronically
guided c–h functionalization pathways from rhodium–abnormal
nhc intermediates |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6641269/ https://www.ncbi.nlm.nih.gov/pubmed/31458483 http://dx.doi.org/10.1021/acsomega.7b01846 |
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