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Enantioselective Heterogeneous Synergistic Catalysis for Asymmetric Cascade Transformations
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för organisk kemi.
Vise andre og tillknytning
2014 (engelsk)Inngår i: Advanced Synthesis and Catalysis, ISSN 1615-4150, E-ISSN 1615-4169, Vol. 356, nr 11-12, s. 2485-2492Artikkel i tidsskrift (Fagfellevurdert) Published
Abstract [en]

A modular design for a novel heterogeneous synergistic catalytic system, which simultaneously activates the electrophile and nucleophile by the combined activation modes of a separate metal and non-metal catalyst, for asymmetric cascade transformations on a solid surface is disclosed. This modular catalysis strategy generates carbocycles (up to 97.5: 2.5 er) as well as spirocyclic oxindoles (97.5: 2.5 to > 99: 0.5 er), containing all-carbon quaternary centers, in a highly enantioselective fashion via a one-pot dynamic relay process.

sted, utgiver, år, opplag, sider
2014. Vol. 356, nr 11-12, s. 2485-2492
Emneord [en]
all-carbon quaternary stereocenters, carbocycles, co-catalysis, dynamic transformations, heterogeneous synergistic catalysis
HSV kategori
Forskningsprogram
organisk kemi
Identifikatorer
URN: urn:nbn:se:su:diva-107625DOI: 10.1002/adsc.201400291ISI: 000340567100014OAI: oai:DiVA.org:su-107625DiVA, id: diva2:749423
Forskningsfinansiär
Swedish Research CouncilVINNOVA
Merknad

AuthorCount:8;

Tilgjengelig fra: 2014-09-24 Laget: 2014-09-22 Sist oppdatert: 2017-12-05bibliografisk kontrollert
Inngår i avhandling
1. Development of Catalytic Enantioselective Approaches for the Synthesis of Carbocycles and Heterocycles
Åpne denne publikasjonen i ny fane eller vindu >>Development of Catalytic Enantioselective Approaches for the Synthesis of Carbocycles and Heterocycles
2013 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

In biological systems, most of the active organic molecules are chiral. Some of the main constituents of living organisms are amino acids and sugars. They exist predominantly in only one enantiomerically pure form. For example, our proteins are built-up by L-amino acids and as a consequence they are enatiomerically pure and will interact in different ways with enantiomers of chiral molecules. Indeed, different enantiomers or diastereomers of a molecule could often have a drastically different biological activity. It is of paramount importance in organic synthesis to develop new routes to control and direct the stereochemical outcome of reactions. The aim of this thesis is to investigate new protocols for the synthesis of complex chiral molecules using simple, environmentally friendly proline-based organocatalysts. We have investigated, the aziridination of linear and branched enals, the stereoselective synthesis of β-amino acids with a carbene co-catalyst, the synthesis of pyrazolidines, the combination of heterogeneous transition metal catalysis and amine catalysis to deliver cyclopentenes bearing an all-carbon quaternary stereocenter and a new heterogeneous dual catalyst system for the carbocyclization of enals. The reactions presented in this thesis afforded the corresponding products with high levels of chemo-, diastero- and enantioselectivity.

sted, utgiver, år, opplag, sider
Stockholm: Department of Organic Chemistry, Stockholm University, 2013. s. 75
Emneord
Organocatalysis, Asymmetric Catalysis, Heterogeneous Catalysis, Aziridines, Pyrazolidines, Cyclopentanes
HSV kategori
Forskningsprogram
organisk kemi
Identifikatorer
urn:nbn:se:su:diva-94680 (URN)978-91-7447-781-8 (ISBN)
Disputas
2013-12-04, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B, Stockholm, 10:00 (engelsk)
Opponent
Veileder
Merknad

At the time of the doctoral defense, the following paper was unpublished and had a status as follows: Paper 5: Submitted. 

Tilgjengelig fra: 2013-11-12 Laget: 2013-10-08 Sist oppdatert: 2014-09-24bibliografisk kontrollert

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