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Lewis acid mediated 1,2 -rearrangement of ammonium ylides
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
KTH, Skolan för kemivetenskap (CHE), Kemi, Organisk kemi.
2007 (engelsk)Inngår i: Tetrahedron Letters, ISSN 0040-4039, E-ISSN 1359-8562, Vol. 48, nr 28, s. 4947-4949Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

The first example of Lewis acid mediated [1,2]-rearrangement of various glycine derivatives has been developed. A brief study of steric and electronic properties of the migrating group is presented. The corresponding amides were obtained in good yields and in the case of substrate 4d, moderate diastereoselectivity was observed.

sted, utgiver, år, opplag, sider
2007. Vol. 48, nr 28, s. 4947-4949
Emneord [en]
[1, 2]-rearrangement, ammonium ylide, Lewis acid, microwave irradiation, amide, stevens 1, 2, rearrangement
HSV kategori
Identifikatorer
URN: urn:nbn:se:kth:diva-16773DOI: 10.1016/j.tetlet.2007.04.151ISI: 000247848900034Scopus ID: 2-s2.0-34250003216OAI: oai:DiVA.org:kth-16773DiVA, id: diva2:334816
Merknad
QC 20100525Tilgjengelig fra: 2010-08-05 Laget: 2010-08-05 Sist oppdatert: 2017-12-12bibliografisk kontrollert
Inngår i avhandling
1. Development of New Methodology in Organic Synthesis: Lewis Acid-Mediated Rearrangements of Ammonium Ylides and Addition of 1, 3-bis(silyl) propenes to Aldehydes
Åpne denne publikasjonen i ny fane eller vindu >>Development of New Methodology in Organic Synthesis: Lewis Acid-Mediated Rearrangements of Ammonium Ylides and Addition of 1, 3-bis(silyl) propenes to Aldehydes
2009 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

This thesis deals with the development of new methodologies in organicsynthesis. The main focus is on the development of Lewis acid-mediated [1,2]-rearrangements of ammonium ylides and the novel addition of 1,3-bis(silyl)propenes to carbonyl compounds.The first part of this thesis describes the development of a Lewis acidmediated[1,2]-Stevens rearrangement of various glycine derivatives. Thismethodology was then applied to the development of an asymmetric Lewis acid mediated [1,2]-Stevens rearrangement of cyclic ammonium ylides. There markably high degree of C→N→C chirality transfer is described. In addition, this methodology was successfully applied to the synthesis of various quaternary proline derivatives in enantiomerically pure form.Secondly, a brief study of the asymmetric [2,3]-rearrangement of α-substitutedglycine derivatives is presented. The investigation revealed a severely limitedreaction scope. The subsequent study on developing super-reactive cationicLewis acid also met with little success.Finally, an addition reaction of various 1,3-bis(silyl)propenes to glyoxalates has been developed. The reaction products correspond to the direct vinylation ofglyoxalates. The corresponding highly functionalized δ-hydroxy allylsilanes were obtained in high yields.

sted, utgiver, år, opplag, sider
Stockholm: KTH, 2009. s. 63
Serie
Trita-CHE-Report, ISSN 1654-1081 ; 2009:13
Emneord
asymmetric, amino acid, ammonium ylide, Lewis acid, microwave irradiation
HSV kategori
Identifikatorer
urn:nbn:se:kth:diva-10317 (URN)978-91-7415-268-5 (ISBN)
Disputas
2009-04-24, F3. KTH, Lindstedtsvägen 26, Stockholm, 13:00 (engelsk)
Opponent
Veileder
Merknad
QC 20100812Tilgjengelig fra: 2009-05-06 Laget: 2009-05-06 Sist oppdatert: 2010-08-12bibliografisk kontrollert

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