Air-Stable CpCoI–Phosphite–Fumarate Precatalyst in Cyclization Reactions: Comparing Different Methods of Energy Supply

dc.bibliographicCitation.firstPage3193
dc.bibliographicCitation.issue24
dc.bibliographicCitation.journalTitleEuropean Journal of Organic Chemistryeng
dc.bibliographicCitation.lastPage3201
dc.bibliographicCitation.volume2018
dc.contributor.authorFischer, Fabian
dc.contributor.authorHapke, Marko
dc.date.accessioned2023-01-16T09:31:44Z
dc.date.available2023-01-16T09:31:44Z
dc.date.issued2018
dc.description.abstractThe robust CoI precatalyst [CpCo(P{OEt}3)(trans-MeO2CHC=CHCO2Me)] was investigated in cyclotrimerizations, furnishing benzenes and pyridines from triynes, diynes and nitriles, comparing the influence of different ways of energy supply; namely, irradiation and conventional (thermal) or microwave heating. The precatalyst was found to work under all conditions, including the possibility to catalyze cyclotrimerizations at room temperature under photochemical conditions at longer reaction times. Performance of the reactions in a microwave reactor proved to be the most time-efficient way to rapidly assemble the expected reaction products; however, careful selection of reaction conditions can be required. The synthesis of pyridines and isoquinolines successfully involved the utilization of versatile functionalized nitriles, affording structurally interesting reaction products. Comparison with the known and often applied precatalyst CpCo(CO)2 demonstrated the significantly higher reactivity of the CpCoI–phosphite–olefin precatalyst.eng
dc.description.versionpublishedVersioneng
dc.identifier.urihttps://oa.tib.eu/renate/handle/123456789/10842
dc.identifier.urihttp://dx.doi.org/10.34657/9868
dc.language.isoeng
dc.publisherWeinheim : Wiley-VCH Verl.
dc.relation.doihttps://doi.org/10.1002/ejoc.201800196
dc.relation.essn1099-0690
dc.relation.issn1434-193X
dc.rights.licenseCC BY-NC 4.0 Unported
dc.rights.urihttps://creativecommons.org/licenses/by-nc/4.0/
dc.subject.ddc540
dc.subject.otherCatalyst activationeng
dc.subject.otherCobalteng
dc.subject.otherCycloadditioneng
dc.subject.otherEarth-abundant metalseng
dc.subject.otherMicrowaveeng
dc.subject.otherPyridineseng
dc.subject.otherSynthetic methodseng
dc.titleAir-Stable CpCoI–Phosphite–Fumarate Precatalyst in Cyclization Reactions: Comparing Different Methods of Energy Supplyeng
dc.typeArticleeng
dc.typeTexteng
tib.accessRightsopenAccess
wgl.contributorLIKAT
wgl.subjectChemieger
wgl.typeZeitschriftenartikelger
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