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Synthesis of modifiers: summary research report I (VJ01010065-V1)
Storch, Jan
The present result (VJ01010065-V1) of the project Express and portable detection of banned compounds using innovative techniques: flexible and chiral SERS, selective surface extraction, neural networks (VJ01010065), provides detailed information on the synthesis of modifiers - helicenes, which will be further utilized for the modification of SERS active surfaces within the project. \nThe report is a planned output of the WP1b stage, which was implemented in the period 1/2021 - 12/2021 according to the project documentation.\n\n
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Photochemical Derivatization of Helicenes.
Jakubec, Martin
Helicenes are a class of polyaromatic compounds that have been increasingly studied over the past years. Their chirality, extended π-system and other intriguing characteristics make them worth exploiting in various fields of chemistry and material science.
Fulltext: content.csg -  PDF
Plný tet: SKMBT_C22019053108330 - PDF
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Synthesis of Enantiomerically Pure Helical Aromatics Such As NHC Ligands and Their Use in Asymmetric Catalysis
Karras, Manfred ; Starý, Ivo (advisor) ; Schmidt, Bernd (referee) ; Veselý, Jan (referee)
Various ways of preparing enantiomerically pure 2-amino[6]helicene derivatives were explored. Ni(0) mediated cyclotrimerization of enantiopure triynes provided (M)- and (P)-7,8-bis(p-tolyl)hexahelicene-2-amine in >99% ee as well as its benzoderivative in >99% ee. The stereocontrol was found to be inefficient for a 2- aminobenzo[6]helicene congener with an embedded five-membered ring. Helically chiral imidazolium salts bearing one or two helicene moieties have been synthesized and applied in enantioselective [2+2+2] cyclotrimerization catalyzed by an in situ formed Ni(0)-NHC complex. The synthesis of the first helically chiral Pd- and Ru- NHC complexes and their application in enantioselective catalysis was demonstrated. The latter shows promising results in enantioselective olefin metathesis reactions. A mechanistic proposal for asymmetric ring closing metathesis is provided.
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Phosphorus Derivatives of Helicenes.
Beránek, Tomáš
In this work, synthetic pathways providing suitable phosphorous derivatives of helicenes and their transition metal complexes in both the racemic and the chiral forms were investigated in asymmetric Suzuki reaction.
Fulltext: content.csg - PDF
Plný tet: SKMBT_C22018060408151 - PDF
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