DBU-promoted nucleophilic activation of organic carbonates
The reactivity of carbonic acid diesters in the presence of the amidine base DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) has been investigated for the first time. Organic carbonates can be activated by DBU through the formation of N-alkoxycarbonyl ketene aminal 2 as the ultimate product. The latter spe...
Published in: | European Journal of Organic Chemistry |
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Online Access: | http://hdl.handle.net/11586/134411 https://doi.org/10.1002/ejoc.201001725 http://onlinelibrary.wiley.com/doi/10.1002/ejoc.201001725/pdf |
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ftunivbari:oai:ricerca.uniba.it:11586/134411 2024-04-14T08:10:17+00:00 DBU-promoted nucleophilic activation of organic carbonates Carafa M MESTO, ERNESTO QUARANTA, Eugenio Carafa, M Mesto, Ernesto Quaranta, Eugenio 2011 http://hdl.handle.net/11586/134411 https://doi.org/10.1002/ejoc.201001725 http://onlinelibrary.wiley.com/doi/10.1002/ejoc.201001725/pdf eng eng info:eu-repo/semantics/altIdentifier/wos/WOS:000289649500008 volume:13 issue:13 firstpage:2458 lastpage:2465 numberofpages:8 journal:EUROPEAN JOURNAL OF ORGANIC CHEMISTRY http://hdl.handle.net/11586/134411 doi:10.1002/ejoc.201001725 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79954622226 http://onlinelibrary.wiley.com/doi/10.1002/ejoc.201001725/pdf Organocatalysis reaction mechanism amidine base carbonic acid ester info:eu-repo/semantics/article 2011 ftunivbari https://doi.org/10.1002/ejoc.201001725 2024-03-21T18:13:08Z The reactivity of carbonic acid diesters in the presence of the amidine base DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) has been investigated for the first time. Organic carbonates can be activated by DBU through the formation of N-alkoxycarbonyl ketene aminal 2 as the ultimate product. The latter species may form through deprotonation of the corresponding N-alkoxycarbonyl-amidinium cation 1+ by the amidine base. We have for the first time isolated and characterized both in the solid state (X-ray crystal structure determination, IR) and in solution (NMR), a few 1+ chloride salts and studied their reactivity towards the organic base. The reactivity of both 1+ and 2 with methanol has also been explored. Ketene aminal 2 behaves as a “CO2R” carrier, as it can selectively transfer the alkoxycarbonyl group to the alcohol and regenerate the amidine base. Article in Journal/Newspaper Carbonic acid Università degli Studi di Bari Aldo Moro: CINECA IRIS Ketene ENVELOPE(147.471,147.471,60.241,60.241) European Journal of Organic Chemistry 2011 13 2458 2465 |
institution |
Open Polar |
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Università degli Studi di Bari Aldo Moro: CINECA IRIS |
op_collection_id |
ftunivbari |
language |
English |
topic |
Organocatalysis reaction mechanism amidine base carbonic acid ester |
spellingShingle |
Organocatalysis reaction mechanism amidine base carbonic acid ester Carafa M MESTO, ERNESTO QUARANTA, Eugenio DBU-promoted nucleophilic activation of organic carbonates |
topic_facet |
Organocatalysis reaction mechanism amidine base carbonic acid ester |
description |
The reactivity of carbonic acid diesters in the presence of the amidine base DBU (1,8-diazabicyclo[5.4.0]undec-7-ene) has been investigated for the first time. Organic carbonates can be activated by DBU through the formation of N-alkoxycarbonyl ketene aminal 2 as the ultimate product. The latter species may form through deprotonation of the corresponding N-alkoxycarbonyl-amidinium cation 1+ by the amidine base. We have for the first time isolated and characterized both in the solid state (X-ray crystal structure determination, IR) and in solution (NMR), a few 1+ chloride salts and studied their reactivity towards the organic base. The reactivity of both 1+ and 2 with methanol has also been explored. Ketene aminal 2 behaves as a “CO2R” carrier, as it can selectively transfer the alkoxycarbonyl group to the alcohol and regenerate the amidine base. |
author2 |
Carafa, M Mesto, Ernesto Quaranta, Eugenio |
format |
Article in Journal/Newspaper |
author |
Carafa M MESTO, ERNESTO QUARANTA, Eugenio |
author_facet |
Carafa M MESTO, ERNESTO QUARANTA, Eugenio |
author_sort |
Carafa M |
title |
DBU-promoted nucleophilic activation of organic carbonates |
title_short |
DBU-promoted nucleophilic activation of organic carbonates |
title_full |
DBU-promoted nucleophilic activation of organic carbonates |
title_fullStr |
DBU-promoted nucleophilic activation of organic carbonates |
title_full_unstemmed |
DBU-promoted nucleophilic activation of organic carbonates |
title_sort |
dbu-promoted nucleophilic activation of organic carbonates |
publishDate |
2011 |
url |
http://hdl.handle.net/11586/134411 https://doi.org/10.1002/ejoc.201001725 http://onlinelibrary.wiley.com/doi/10.1002/ejoc.201001725/pdf |
long_lat |
ENVELOPE(147.471,147.471,60.241,60.241) |
geographic |
Ketene |
geographic_facet |
Ketene |
genre |
Carbonic acid |
genre_facet |
Carbonic acid |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/WOS:000289649500008 volume:13 issue:13 firstpage:2458 lastpage:2465 numberofpages:8 journal:EUROPEAN JOURNAL OF ORGANIC CHEMISTRY http://hdl.handle.net/11586/134411 doi:10.1002/ejoc.201001725 info:eu-repo/semantics/altIdentifier/scopus/2-s2.0-79954622226 http://onlinelibrary.wiley.com/doi/10.1002/ejoc.201001725/pdf |
op_doi |
https://doi.org/10.1002/ejoc.201001725 |
container_title |
European Journal of Organic Chemistry |
container_volume |
2011 |
container_issue |
13 |
container_start_page |
2458 |
op_container_end_page |
2465 |
_version_ |
1796307799364337664 |