Practical Asymmetric Synthesis of a Selective Endothelin A Receptor (ETA) Antagonist
A practical, chromotography-free asymmetric synthesis was developed for the large scale preparation of an endothelin receptor antagonist 2. This synthesis includes a new efficient process for the preparation of 6-bromo-2,3-dihydrobenzofuran, a stereoselective conjugate addition of an aryllithium fol...
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Veröffentlicht in: | Organic letters 2001-10, Vol.3 (21), p.3357-3360 |
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creator | Song, Zhiguo J Zhao, Matthew Frey, Lisa Li, Jing Tan, Lushi Chen, Cheng Y Tschaen, David M Tillyer, Richard Grabowski, Edward J. J Volante, Ralph Reider, Paul J Kato, Yoshiaki Okada, Shigemitsu Nemoto, Takayuki Sato, Hiroki Akao, Atsushi Mase, Toshiaki |
description | A practical, chromotography-free asymmetric synthesis was developed for the large scale preparation of an endothelin receptor antagonist 2. This synthesis includes a new efficient process for the preparation of 6-bromo-2,3-dihydrobenzofuran, a stereoselective conjugate addition of an aryllithium followed by stereospecific addition of the Grignard reagent of the top aryl bromide, and an aminophosphate-mediated sterospecific intramolecular enolate alkylation, which led to the formation of the five-membered ring bearing three contiguous asymmetric centers. |
doi_str_mv | 10.1021/ol016601s |
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This synthesis includes a new efficient process for the preparation of 6-bromo-2,3-dihydrobenzofuran, a stereoselective conjugate addition of an aryllithium followed by stereospecific addition of the Grignard reagent of the top aryl bromide, and an aminophosphate-mediated sterospecific intramolecular enolate alkylation, which led to the formation of the five-membered ring bearing three contiguous asymmetric centers.</description><identifier>ISSN: 1523-7060</identifier><identifier>EISSN: 1523-7052</identifier><identifier>DOI: 10.1021/ol016601s</identifier><identifier>PMID: 11594833</identifier><language>eng</language><publisher>United States: American Chemical Society</publisher><subject>Antihypertensive Agents - chemical synthesis ; Benzofurans - chemical synthesis ; Endothelin Receptor Antagonists ; Pyridines - chemical synthesis ; Receptor, Endothelin A</subject><ispartof>Organic letters, 2001-10, Vol.3 (21), p.3357-3360</ispartof><rights>Copyright © 2001 American Chemical Society</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-a379t-a66ef01b87fc9320548f5cce9425bc3c09890048f49630c435dddc11fd59a9143</citedby><cites>FETCH-LOGICAL-a379t-a66ef01b87fc9320548f5cce9425bc3c09890048f49630c435dddc11fd59a9143</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://pubs.acs.org/doi/pdf/10.1021/ol016601s$$EPDF$$P50$$Gacs$$H</linktopdf><linktohtml>$$Uhttps://pubs.acs.org/doi/10.1021/ol016601s$$EHTML$$P50$$Gacs$$H</linktohtml><link.rule.ids>314,776,780,2752,27053,27901,27902,56713,56763</link.rule.ids><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/11594833$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Song, Zhiguo J</creatorcontrib><creatorcontrib>Zhao, Matthew</creatorcontrib><creatorcontrib>Frey, Lisa</creatorcontrib><creatorcontrib>Li, Jing</creatorcontrib><creatorcontrib>Tan, Lushi</creatorcontrib><creatorcontrib>Chen, Cheng Y</creatorcontrib><creatorcontrib>Tschaen, David M</creatorcontrib><creatorcontrib>Tillyer, Richard</creatorcontrib><creatorcontrib>Grabowski, Edward J. 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This synthesis includes a new efficient process for the preparation of 6-bromo-2,3-dihydrobenzofuran, a stereoselective conjugate addition of an aryllithium followed by stereospecific addition of the Grignard reagent of the top aryl bromide, and an aminophosphate-mediated sterospecific intramolecular enolate alkylation, which led to the formation of the five-membered ring bearing three contiguous asymmetric centers.</description><subject>Antihypertensive Agents - chemical synthesis</subject><subject>Benzofurans - chemical synthesis</subject><subject>Endothelin Receptor Antagonists</subject><subject>Pyridines - chemical synthesis</subject><subject>Receptor, Endothelin A</subject><issn>1523-7060</issn><issn>1523-7052</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2001</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNptkM1OwzAQhC0EoqVw4AWQLyB6KKzjOImPUVV-pEogWs6R62wgVRIX20Hq22PUqlw4zWr225F2CLlkcMcgYvemAZYkwNwRGTIR8UkKIjo-zAkMyJlzawAWHHlKBkFlnHE-JMtXq7SvtWpo7rZti97Wmi62nf9EVztqKqroAhsM0DfSWVeasGnqjub0DTVuvLH0drbMxzTvvPowXe38OTmpVOPwYq8j8v4wW06fJvOXx-dpPp8onko_UUmCFbBVllZa8ghEnFVCa5RxJFaaa5CZBAhmLBMOOuaiLEvNWFUKqSSL-Yjc7HI31nz16HzR1k5j06gOTe-KNGJZIsLxiIx3oLbGOYtVsbF1q-y2YFD8VlgcKgzs1T60X7VY_pH7zgJwvQOUdsXa9LYLP_4T9APF-Xa-</recordid><startdate>20011018</startdate><enddate>20011018</enddate><creator>Song, Zhiguo J</creator><creator>Zhao, Matthew</creator><creator>Frey, Lisa</creator><creator>Li, Jing</creator><creator>Tan, Lushi</creator><creator>Chen, Cheng Y</creator><creator>Tschaen, David M</creator><creator>Tillyer, Richard</creator><creator>Grabowski, Edward J. 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This synthesis includes a new efficient process for the preparation of 6-bromo-2,3-dihydrobenzofuran, a stereoselective conjugate addition of an aryllithium followed by stereospecific addition of the Grignard reagent of the top aryl bromide, and an aminophosphate-mediated sterospecific intramolecular enolate alkylation, which led to the formation of the five-membered ring bearing three contiguous asymmetric centers.</abstract><cop>United States</cop><pub>American Chemical Society</pub><pmid>11594833</pmid><doi>10.1021/ol016601s</doi><tpages>4</tpages></addata></record> |
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subjects | Antihypertensive Agents - chemical synthesis Benzofurans - chemical synthesis Endothelin Receptor Antagonists Pyridines - chemical synthesis Receptor, Endothelin A |
title | Practical Asymmetric Synthesis of a Selective Endothelin A Receptor (ETA) Antagonist |
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