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Performance of SCS palladium pincer complexes in borylation of allylic alcohols. Control of the regioselectivity in the one-pot borylation-allylation process
Stockholm University, Faculty of Science, Department of Organic Chemistry.
Stockholm University, Faculty of Science, Department of Organic Chemistry.
2009 (English)In: Journal of Organic Chemistry, ISSN 0022-3263, E-ISSN 1520-6904, Vol. 74, no 15, 5695-5698 p.Article in journal (Refereed) Published
Abstract [en]

One-pot borylation−allylation reactions of aldehydes and allylic alcohols were performed under various reaction conditions. The borylation of allylic alcohols was performed using a very efficient SCS palladium pincer-complex catalyst. The regioselectivity of the allylation depends on the applied solvent. The reaction in CHCl3 gave the linear allylic product; however, when MeOH was added to the reaction mixture, the branched allylic product was formed.

Place, publisher, year, edition, pages
American Chemical Society , 2009. Vol. 74, no 15, 5695-5698 p.
National Category
Organic Chemistry
Identifiers
URN: urn:nbn:se:su:diva-31751DOI: 10.1021/jo9008673ISI: 000268480300090OAI: oai:DiVA.org:su-31751DiVA: diva2:278464
Available from: 2009-11-26 Created: 2009-11-26 Last updated: 2017-12-12Bibliographically approved
In thesis
1. Catalytic Functionalization of Allylic Substrates by Palladium Pincer Complexes
Open this publication in new window or tab >>Catalytic Functionalization of Allylic Substrates by Palladium Pincer Complexes
2010 (English)Doctoral thesis, comprehensive summary (Other academic)
Abstract [en]

This thesis is based on the development of novel catalytic reactions for the synthesis and application of organometallic reagents. The main focus is directed towards organoboronate derivatives. We developed an efficient procedure for converting allylic alcohols to the corresponding allylboronates using palladium pincer complexes as catalysts. The reactions were performed under mild conditions with high selectivity, allowing further one-pot transformations. Using this approach, a variety of stereodefined homoallylic alcohols and amino acid derivatives were synthesized via trapping of the in situ generated allylboronate derivatives with an appropriate electrophile. The synthetic scope of these types of multi-component reactions is broad as many different substrate allylic alcohols may be used together with various electrophiles. Several aspects of these reactions were studied, including different reagents, catalysts and electrophiles.

Furthermore, we studied the possibility to use oxidizing reagents as an essential component in the functionalization of olefins. Two main strategies were utilized for these catalytic methods using palladium pincer complexes. The functional group was either transferred from the oxidizing reagent, or introduced via an oxidation-transmetallation route. We propose that both methods involve palladium(IV) intermediates thus expanding both the coordination sphere of palladium and the synthetic scope of pincer complex catalysis.

Place, publisher, year, edition, pages
Stockholm: Department of Organic Chemistry, Stockholm University, 2010. 65 p.
Keyword
Catalysis, Palladium, Pincer Complex, Boron, Multicomponent Reaction
National Category
Organic Chemistry
Research subject
Organic Chemistry
Identifiers
urn:nbn:se:su:diva-39065 (URN)978-91-7447-090-1 (ISBN)
Public defence
2010-06-22, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 16 B, Stockholm, 13:00 (English)
Opponent
Supervisors
Note
At the time of the doctoral defense, the following papers were unpublished and had a status as follows: Paper 11: In press.Available from: 2010-05-24 Created: 2010-05-06 Last updated: 2010-05-21Bibliographically approved

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