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Asymmetric Synthesis of Iridoid Derivatives Using Resolved 2-Phenylindoline as a Chiral Auxiliary
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
Vise andre og tillknytning
2008 (engelsk)Inngår i: European Journal of Organic Chemistry, ISSN 1434-193X, E-ISSN 1099-0690, nr 35, s. 5915-5921Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

An asymmetric synthetic route to cis,cis-nepetalactol (component of the sex pheromone for the hop aphid, Phorodon humuli) is presented. 2-Phenylindoline was resolved to provide a chiral auxiliary for the cycloaddition of oxocitral. The resolution was made by chromatographic separation of the diastereomers of the urea derivative made from 2-phenylindoline and with (R)-(+)-alpha-methylbenzyl isocyanate, followed by reductive cleavage of the isolated diasteromers using diborane. The cycloaddition of oxocitral using (S)-2-phenylindoline yielded an enantiopure product after chromatography. Hydrolysis of the cycloaddition adduct yielded gastrolactol (3). As gastrolactol is a versatile synthon for the synthesis of iridoids, the overall procedure provides a general asymmetric route to elaborated iridoids.

sted, utgiver, år, opplag, sider
2008. nr 35, s. 5915-5921
Emneord [en]
Iridoid, Cycloaddition reaction, Nepetalactol, Chromatographic resolution, 2-Phenylindoline
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-34128DOI: 10.1002/ejoc.200800440ISI: 000261941500006Scopus ID: 2-s2.0-56749088092OAI: oai:DiVA.org:kth-34128DiVA, id: diva2:419569
Merknad

QC 20110527

Tilgjengelig fra: 2011-05-27 Laget: 2011-05-26 Sist oppdatert: 2017-12-11bibliografisk kontrollert

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Santangelo, Ellen M.Liblikas, IlmeMudalige, AnomaNorrby, Per-OlaUnelius, C. Rikard
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