Free radical-mediated ring expansion reactions: Endocyclic cleavage of cyclopropylcarbinyl radicals

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dc.contributor.authorLee, PHko
dc.contributor.authorLee, Bko
dc.contributor.authorLee, Kko
dc.contributor.authorLee, CHko
dc.contributor.authorChang, Sukbokko
dc.date.accessioned2013-03-02T21:00:09Z-
dc.date.available2013-03-02T21:00:09Z-
dc.date.created2012-02-06-
dc.date.created2012-02-06-
dc.date.issued2000-06-
dc.identifier.citationBULLETIN OF THE KOREAN CHEMICAL SOCIETY, v.21, no.6, pp.595 - 603-
dc.identifier.issn0253-2964-
dc.identifier.urihttp://hdl.handle.net/10203/75495-
dc.description.abstractRing expansion reactions via endocyclic cleavage of cyclopropylcarbinyl radicals derived from the reaction of [1 -benzyloxycarbonylbicyclo[n.1.0]alk-(n+1)-yl]-1-imidazolethiocarboxylates with tributyltin hydride/AIBN proceeded to produce 3-cycloalkenecarboxylates in good yields. Benzyl (5 '-phenoxypentyl)-3-cyclohepten-1-carboxylate was obtained in 33% yield from the reaction of benzyl 5-methylenebicyclo[4.1.0]-1-carboxylates with 4-phenoxybutyl iodide under radical conditions. Selective cleavage of endocyclic bond in cyclopropane to the cyclohexane, results from stabilization of the resultant radical by the carbonyl groups, such as the benzyloxycarbonyl group, which lower the transition state energy for the final cyclopropane cleavage in the ring expansion.-
dc.languageEnglish-
dc.publisherKOREAN CHEMICAL SOC-
dc.subjectELECTRON-TRANSFER-
dc.subjectGROUP MIGRATION-
dc.subjectBETA-FISSION-
dc.subjectREARRANGEMENT-
dc.subjectFRAGMENTATION-
dc.subjectCYCLOPROPANES-
dc.subjectKETONES-
dc.subjectSYSTEM-
dc.subjectALKYL-
dc.subjectCYANO-
dc.titleFree radical-mediated ring expansion reactions: Endocyclic cleavage of cyclopropylcarbinyl radicals-
dc.typeArticle-
dc.identifier.wosid000087952200011-
dc.identifier.scopusid2-s2.0-12944255843-
dc.type.rimsART-
dc.citation.volume21-
dc.citation.issue6-
dc.citation.beginningpage595-
dc.citation.endingpage603-
dc.citation.publicationnameBULLETIN OF THE KOREAN CHEMICAL SOCIETY-
dc.contributor.localauthorChang, Sukbok-
dc.contributor.nonIdAuthorLee, PH-
dc.contributor.nonIdAuthorLee, B-
dc.contributor.nonIdAuthorLee, K-
dc.contributor.nonIdAuthorLee, CH-
dc.type.journalArticleArticle-
dc.subject.keywordPlusELECTRON-TRANSFER-
dc.subject.keywordPlusGROUP MIGRATION-
dc.subject.keywordPlusBETA-FISSION-
dc.subject.keywordPlusREARRANGEMENT-
dc.subject.keywordPlusFRAGMENTATION-
dc.subject.keywordPlusCYCLOPROPANES-
dc.subject.keywordPlusKETONES-
dc.subject.keywordPlusSYSTEM-
dc.subject.keywordPlusALKYL-
dc.subject.keywordPlusCYANO-
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