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Enantioselective Amination of 3‐Substituted‐2‐benzofuranones via Non‐covalent N‐Heterocyclic Carbene Catalysis
Herein, an efficient method for asymmetric α‐amination of 2‐benzofuranones with N‐heterocyclic carbene (NHC) catalysis is reported. The process is based on non‐covalent interaction of NHC with substrate, facilitating the formation of a chiral ion‐pair that encompasses enolate and azolium salt. The a...
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Published in: | Chemistry : a European journal 2024-01, Vol.30 (5), p.e202303115-n/a |
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creator | Mondal, Bhaskar Deb Gorai, Sadhan Nath, Rounak Paul, Ankan Guin, Joyram |
description | Herein, an efficient method for asymmetric α‐amination of 2‐benzofuranones with N‐heterocyclic carbene (NHC) catalysis is reported. The process is based on non‐covalent interaction of NHC with substrate, facilitating the formation of a chiral ion‐pair that encompasses enolate and azolium salt. The activated enolate adds to an electrophilic amine source with sufficient facial control to furnish an enantioenriched product having an amine substituted quaternary stereocenter. The process displays a broad substrate scope. A preparative scale synthesis has been achieved. Preliminary mechanistic investigations based on experimental and DFT studies suggest a reaction pathway that involves non‐covalent substrate/NHC interactions and essentially implicate the role of π‐π interaction in diastereomeric transition states for stereo‐chemical discrimination.
Herein, we present an efficient enantioselective amination of 3‐substituted‐2‐benzofuranones utilizing non‐covalent N‐heterocyclic carbene (NHC) catalysis. The process is applicable to various functionalized substrates and it is found to be scalable. Mechanistic investigations based on control experimental and DFT studies suggest that the reaction operates via non‐covalent substrate/NHC interactions. |
doi_str_mv | 10.1002/chem.202303115 |
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Herein, we present an efficient enantioselective amination of 3‐substituted‐2‐benzofuranones utilizing non‐covalent N‐heterocyclic carbene (NHC) catalysis. The process is applicable to various functionalized substrates and it is found to be scalable. Mechanistic investigations based on control experimental and DFT studies suggest that the reaction operates via non‐covalent substrate/NHC interactions.</description><identifier>ISSN: 0947-6539</identifier><identifier>EISSN: 1521-3765</identifier><identifier>DOI: 10.1002/chem.202303115</identifier><identifier>PMID: 37997460</identifier><language>eng</language><publisher>Germany: Wiley Subscription Services, Inc</publisher><subject>2-benzofuranones ; Amination ; asymmetric amination ; Carbenes ; Catalysis ; Chemistry ; Covalence ; Enantiomers ; ion-pair ; NHC ; non-covalent catalysis ; Substitutes ; Substrates</subject><ispartof>Chemistry : a European journal, 2024-01, Vol.30 (5), p.e202303115-n/a</ispartof><rights>2023 Wiley‐VCH GmbH</rights><rights>2023 Wiley-VCH GmbH.</rights><rights>2024 Wiley‐VCH GmbH</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><cites>FETCH-LOGICAL-c3285-d3c0a171724aa11602d9f7139aeada2b29c8de0f21a952f46c9c20eeabfbcb6b3</cites><orcidid>0000-0002-0129-0754</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784,27924,27925</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/37997460$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Mondal, Bhaskar Deb</creatorcontrib><creatorcontrib>Gorai, Sadhan</creatorcontrib><creatorcontrib>Nath, Rounak</creatorcontrib><creatorcontrib>Paul, Ankan</creatorcontrib><creatorcontrib>Guin, Joyram</creatorcontrib><title>Enantioselective Amination of 3‐Substituted‐2‐benzofuranones via Non‐covalent N‐Heterocyclic Carbene Catalysis</title><title>Chemistry : a European journal</title><addtitle>Chemistry</addtitle><description>Herein, an efficient method for asymmetric α‐amination of 2‐benzofuranones with N‐heterocyclic carbene (NHC) catalysis is reported. The process is based on non‐covalent interaction of NHC with substrate, facilitating the formation of a chiral ion‐pair that encompasses enolate and azolium salt. The activated enolate adds to an electrophilic amine source with sufficient facial control to furnish an enantioenriched product having an amine substituted quaternary stereocenter. The process displays a broad substrate scope. A preparative scale synthesis has been achieved. Preliminary mechanistic investigations based on experimental and DFT studies suggest a reaction pathway that involves non‐covalent substrate/NHC interactions and essentially implicate the role of π‐π interaction in diastereomeric transition states for stereo‐chemical discrimination.
Herein, we present an efficient enantioselective amination of 3‐substituted‐2‐benzofuranones utilizing non‐covalent N‐heterocyclic carbene (NHC) catalysis. The process is applicable to various functionalized substrates and it is found to be scalable. Mechanistic investigations based on control experimental and DFT studies suggest that the reaction operates via non‐covalent substrate/NHC interactions.</description><subject>2-benzofuranones</subject><subject>Amination</subject><subject>asymmetric amination</subject><subject>Carbenes</subject><subject>Catalysis</subject><subject>Chemistry</subject><subject>Covalence</subject><subject>Enantiomers</subject><subject>ion-pair</subject><subject>NHC</subject><subject>non-covalent catalysis</subject><subject>Substitutes</subject><subject>Substrates</subject><issn>0947-6539</issn><issn>1521-3765</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2024</creationdate><recordtype>article</recordtype><recordid>eNqFkT1PHDEQhq0IBAehTRmtlCbNHv7YL5fodOEiXaCA1Nasd1Yx2rWJ7T1yqfgJ_EZ-CUZHQEpDMXo1M8-8Gukl5BOjc0YpP9W_cJxzygUVjJUfyIyVnOWirso9MqOyqPOqFPKQHIVwQymVlRAH5FDUUtZFRWfkz9KCjcYFHFBHs8HsbDQW0sRmrs_E4_3D1dSGaOIUsUsdT9Wi_ev6yYN1FkO2MZBdOJsW2m1gQBuzi9SsMKJ3eqsHo7MF-HSFSSMM22DCR7LfwxDw5EWPyc9vy-vFKl9fnn9fnK1zLXhT5p3QFFjNal4AMFZR3sm-ZkICQge85VI3HdKeM5Al74tKS80pIrR9q9uqFcfk68731rvfE4aoRhM0DgNYdFNQvJGiEYVkLKFf_kNv3ORt-k5xyeqCN1QUiZrvKO1dCB57devNCH6rGFXPmajnTNRrJung84vt1I7YveL_QkiA3AF3ZsDtO3ZqsVr-eDN_Aqbmn0Y</recordid><startdate>20240122</startdate><enddate>20240122</enddate><creator>Mondal, Bhaskar Deb</creator><creator>Gorai, Sadhan</creator><creator>Nath, Rounak</creator><creator>Paul, Ankan</creator><creator>Guin, Joyram</creator><general>Wiley Subscription Services, Inc</general><scope>NPM</scope><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>K9.</scope><scope>7X8</scope><orcidid>https://orcid.org/0000-0002-0129-0754</orcidid></search><sort><creationdate>20240122</creationdate><title>Enantioselective Amination of 3‐Substituted‐2‐benzofuranones via Non‐covalent N‐Heterocyclic Carbene Catalysis</title><author>Mondal, Bhaskar Deb ; Gorai, Sadhan ; Nath, Rounak ; Paul, Ankan ; Guin, Joyram</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c3285-d3c0a171724aa11602d9f7139aeada2b29c8de0f21a952f46c9c20eeabfbcb6b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2024</creationdate><topic>2-benzofuranones</topic><topic>Amination</topic><topic>asymmetric amination</topic><topic>Carbenes</topic><topic>Catalysis</topic><topic>Chemistry</topic><topic>Covalence</topic><topic>Enantiomers</topic><topic>ion-pair</topic><topic>NHC</topic><topic>non-covalent catalysis</topic><topic>Substitutes</topic><topic>Substrates</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mondal, Bhaskar Deb</creatorcontrib><creatorcontrib>Gorai, Sadhan</creatorcontrib><creatorcontrib>Nath, Rounak</creatorcontrib><creatorcontrib>Paul, Ankan</creatorcontrib><creatorcontrib>Guin, Joyram</creatorcontrib><collection>PubMed</collection><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>ProQuest Health & Medical Complete (Alumni)</collection><collection>MEDLINE - Academic</collection><jtitle>Chemistry : a European journal</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mondal, Bhaskar Deb</au><au>Gorai, Sadhan</au><au>Nath, Rounak</au><au>Paul, Ankan</au><au>Guin, Joyram</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enantioselective Amination of 3‐Substituted‐2‐benzofuranones via Non‐covalent N‐Heterocyclic Carbene Catalysis</atitle><jtitle>Chemistry : a European journal</jtitle><addtitle>Chemistry</addtitle><date>2024-01-22</date><risdate>2024</risdate><volume>30</volume><issue>5</issue><spage>e202303115</spage><epage>n/a</epage><pages>e202303115-n/a</pages><issn>0947-6539</issn><eissn>1521-3765</eissn><abstract>Herein, an efficient method for asymmetric α‐amination of 2‐benzofuranones with N‐heterocyclic carbene (NHC) catalysis is reported. The process is based on non‐covalent interaction of NHC with substrate, facilitating the formation of a chiral ion‐pair that encompasses enolate and azolium salt. The activated enolate adds to an electrophilic amine source with sufficient facial control to furnish an enantioenriched product having an amine substituted quaternary stereocenter. The process displays a broad substrate scope. A preparative scale synthesis has been achieved. Preliminary mechanistic investigations based on experimental and DFT studies suggest a reaction pathway that involves non‐covalent substrate/NHC interactions and essentially implicate the role of π‐π interaction in diastereomeric transition states for stereo‐chemical discrimination.
Herein, we present an efficient enantioselective amination of 3‐substituted‐2‐benzofuranones utilizing non‐covalent N‐heterocyclic carbene (NHC) catalysis. The process is applicable to various functionalized substrates and it is found to be scalable. Mechanistic investigations based on control experimental and DFT studies suggest that the reaction operates via non‐covalent substrate/NHC interactions.</abstract><cop>Germany</cop><pub>Wiley Subscription Services, Inc</pub><pmid>37997460</pmid><doi>10.1002/chem.202303115</doi><tpages>12</tpages><orcidid>https://orcid.org/0000-0002-0129-0754</orcidid></addata></record> |
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subjects | 2-benzofuranones Amination asymmetric amination Carbenes Catalysis Chemistry Covalence Enantiomers ion-pair NHC non-covalent catalysis Substitutes Substrates |
title | Enantioselective Amination of 3‐Substituted‐2‐benzofuranones via Non‐covalent N‐Heterocyclic Carbene Catalysis |
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