Statements in which the resource exists.
SubjectPredicateObjectContext
pubmed-article:15079848rdf:typepubmed:Citationlld:pubmed
pubmed-article:15079848lifeskim:mentionsumls-concept:C0010546lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C0001128lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C0022634lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C0443286lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C0220781lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C1883254lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C0311404lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C0054247lld:lifeskim
pubmed-article:15079848lifeskim:mentionsumls-concept:C0243072lld:lifeskim
pubmed-article:15079848pubmed:issue8lld:pubmed
pubmed-article:15079848pubmed:dateCreated2004-4-13lld:pubmed
pubmed-article:15079848pubmed:abstractTextThe oxidative cyclization/dimerization reaction between two classes of allenes with different functionalities was reported to provide an efficient route to polysubstituted 4-(3'-furanyl)-2(5H)-furanones, which are not readily available from the known methods. The highly optically active butenolides could be easily formed from the optically active 2,3-allenoic acids, which was obtained conveniently through chiral resolution with optically active amines, that is, cinchonidine or alpha-methyl benzylamine. A mechanistic study showed that the reaction proceeded via a matched double oxypalladation-reductive elimination process. The Pd(II) species may be regenerated via the subsequent cyclometallation of two equivalents of 1,2-allenyl ketones with Pd(0) and protonlysis of Pd enolates formed with the in situ generated HCl.lld:pubmed
pubmed-article:15079848pubmed:languageenglld:pubmed
pubmed-article:15079848pubmed:journalhttp://linkedlifedata.com/r...lld:pubmed
pubmed-article:15079848pubmed:statusPubMed-not-MEDLINElld:pubmed
pubmed-article:15079848pubmed:monthAprlld:pubmed
pubmed-article:15079848pubmed:issn0947-6539lld:pubmed
pubmed-article:15079848pubmed:authorpubmed-author:MaShengmingSlld:pubmed
pubmed-article:15079848pubmed:authorpubmed-author:YuZhanqianZlld:pubmed
pubmed-article:15079848pubmed:issnTypePrintlld:pubmed
pubmed-article:15079848pubmed:day19lld:pubmed
pubmed-article:15079848pubmed:volume10lld:pubmed
pubmed-article:15079848pubmed:ownerNLMlld:pubmed
pubmed-article:15079848pubmed:authorsCompleteYlld:pubmed
pubmed-article:15079848pubmed:pagination2078-87lld:pubmed
pubmed-article:15079848pubmed:dateRevised2009-8-4lld:pubmed
pubmed-article:15079848pubmed:year2004lld:pubmed
pubmed-article:15079848pubmed:articleTitleEfficient synthesis of 4-(3'-furanyl)butenolide derivatives via PdII-catalyzed oxidative heterodimeric cyclization reaction of 2,3-allenoic acids and 1,2-allenyl ketones.lld:pubmed
pubmed-article:15079848pubmed:affiliationState Key Laboratory of Organometallic Chemistry, Shanghai Institute of Organic Chemistry, Chinese Academy of Sciences, 354 Fenglin Lu, Shanghai 200032, PR China. masm@mail.sioc.ac.cnlld:pubmed
pubmed-article:15079848pubmed:publicationTypeJournal Articlelld:pubmed