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Article: Cobalt and iron complexes of chiral C1- and C2-terpyridines: Synthesis, characterization and use in catalytic asymmetric cyclopropanation of styrenes

TitleCobalt and iron complexes of chiral C1- and C2-terpyridines: Synthesis, characterization and use in catalytic asymmetric cyclopropanation of styrenes
Authors
KeywordsAsymmetric catalysis
Chiral terpyridine
Cobalt
Cyclopropanation
Iron
Issue Date2009
PublisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/ica
Citation
Inorganica Chimica Acta, 2009, v. 362 n. 9, p. 3267-3273 How to Cite?
AbstractOptically pure C1- and C2-terpyridine ligands (L) form cobalt(II) and iron(II) complexes of formula [Co(L)Cl2] and [Fe(L)Cl2], respectively, and Iron(III) complexes of formulas [Fe(L)Cl3]. Structures of three new chiral cobalt(II) and one iron(III) complexes were analysed using X-ray crystal structure analysis. These complexes were shown to be precursor of efficient catalyst for cyclopropanation. Reaction with AgOTf converted the complex to active catalyst, which gave enantioselectivities of up to 76% ee for the trans-isomers and 83% ee for the cis-isomers of styrene cyclopropanes with ethyl diazoacetate. Hammett studies showed the active species for both cobalt and iron complexes to have a non-linear relationship to σp constant. © 2009 Elsevier B.V. All rights reserved.
Persistent Identifierhttp://hdl.handle.net/10722/58426
ISSN
2015 Impact Factor: 1.918
2015 SCImago Journal Rankings: 0.584
ISI Accession Number ID
Funding AgencyGrant Number
City University of Hong Kong SRGCityU 7002000
7002223
Funding Information:

Financial support for this research from the City University of Hong Kong SRG Grants (CityU 7002000 and 7002223) are gratefully acknowledged.

References

 

DC FieldValueLanguage
dc.contributor.authorYeung, CTen_HK
dc.contributor.authorSham, KCen_HK
dc.contributor.authorLee, WSen_HK
dc.contributor.authorWong, WTen_HK
dc.contributor.authorWong, WYen_HK
dc.contributor.authorKwong, HLen_HK
dc.date.accessioned2010-05-31T03:30:05Z-
dc.date.available2010-05-31T03:30:05Z-
dc.date.issued2009en_HK
dc.identifier.citationInorganica Chimica Acta, 2009, v. 362 n. 9, p. 3267-3273en_HK
dc.identifier.issn0020-1693en_HK
dc.identifier.urihttp://hdl.handle.net/10722/58426-
dc.description.abstractOptically pure C1- and C2-terpyridine ligands (L) form cobalt(II) and iron(II) complexes of formula [Co(L)Cl2] and [Fe(L)Cl2], respectively, and Iron(III) complexes of formulas [Fe(L)Cl3]. Structures of three new chiral cobalt(II) and one iron(III) complexes were analysed using X-ray crystal structure analysis. These complexes were shown to be precursor of efficient catalyst for cyclopropanation. Reaction with AgOTf converted the complex to active catalyst, which gave enantioselectivities of up to 76% ee for the trans-isomers and 83% ee for the cis-isomers of styrene cyclopropanes with ethyl diazoacetate. Hammett studies showed the active species for both cobalt and iron complexes to have a non-linear relationship to σp constant. © 2009 Elsevier B.V. All rights reserved.en_HK
dc.languageengen_HK
dc.publisherElsevier BV. The Journal's web site is located at http://www.elsevier.com/locate/icaen_HK
dc.relation.ispartofInorganica Chimica Actaen_HK
dc.rightsInorganica Chimica Acta. Copyright © Elsevier BV.en_HK
dc.subjectAsymmetric catalysisen_HK
dc.subjectChiral terpyridineen_HK
dc.subjectCobalten_HK
dc.subjectCyclopropanationen_HK
dc.subjectIronen_HK
dc.titleCobalt and iron complexes of chiral C1- and C2-terpyridines: Synthesis, characterization and use in catalytic asymmetric cyclopropanation of styrenesen_HK
dc.typeArticleen_HK
dc.identifier.openurlhttp://library.hku.hk:4550/resserv?sid=HKU:IR&issn=0020-1693&volume=362&spage=3267&epage=3273&date=2009&atitle=Cobalt+and+Iron+Complexes+of+Chiral+C1-+and+C2-Terpyridines:+Synthesis,+Characterization+and+Use+in+Catalytic+Asymmetric+Cyclopropanation+of+Styrenesen_HK
dc.identifier.emailWong, WT: wtwong@hku.hken_HK
dc.identifier.authorityWong, WT=rp00811en_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1016/j.ica.2009.02.034en_HK
dc.identifier.scopuseid_2-s2.0-67349117789en_HK
dc.identifier.hkuros156627en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-67349117789&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume362en_HK
dc.identifier.issue9en_HK
dc.identifier.spage3267en_HK
dc.identifier.epage3273en_HK
dc.identifier.isiWOS:000265659900046-
dc.publisher.placeNetherlandsen_HK
dc.identifier.scopusauthoridYeung, CT=7201354137en_HK
dc.identifier.scopusauthoridSham, KC=24538178700en_HK
dc.identifier.scopusauthoridLee, WS=7407089119en_HK
dc.identifier.scopusauthoridWong, WT=7403973084en_HK
dc.identifier.scopusauthoridWong, WY=7403972153en_HK
dc.identifier.scopusauthoridKwong, HL=35569416300en_HK

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