Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 5 of 5 for “"Chiral induction"”.
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Synthesis of Chiral Benzimidazolylidenes from 1,10-Phenathrolines and 1,10-Phenathroline-2,9-dione /
… current synthetic approaches. The preparation of chiral analogues is even more challenging. Previously, our group has demonstrated an alternative approach to synthesizing benzimidazolylidenes with a tetracyclic framework in three steps from 1,10-phenanthroline. This thesis is focused on approaches …
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IMPROVING THE SCOPE AND UNDERSTANDING OF THE SYMMETRIC AND ASYMMETRIC SUZUKI COUPLING REACTION
… Suzuki cross-couplings towards axially chiral biaryl products have also been detailed. Model reactions towards configurationally stable biaryl products were found to undergo a successful chiral induction with the use of chiral ferrocenyl ligand (R)-(S)-PPFA 180, with high enantiomeric …
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Investigation of aryldimethylsilanolates in palladium-catalyzed cross-coupling reactions and development of chiral bis-hydrazone ligands for asymmetric aryl-aryl couplings
… of a novel synthetic route to access a number of chiral bis-hydrazone ligands featuring a 2,5-diarylpyrrolidine moiety. This endeavor enables systematic investigation of the ligand effect on the reactivity and enantioselectivity of the reaction. The origin of the chiral induction has been …
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Asymmetric reduction using enzymes and Chiral chemical reagents
… is concerned with the asymmetric reduction of achiral substrates to chiral products on a preparative scale. In the first case dihydrofolate reductase was used to catalyse the conversion of 7,8-dihydrofolic acid into (6S)- 5,6,7, B-tetrahydrofolic acid. The required coenzyme,NADPH, was recycled …
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Chiral Polymer Photodetector
… is fabricated using polythiophene with chiral alkyl side chains. The Cotton effect is observed in the CD spectrum of the photodetector, indicating an unequal absorbance of left- and right-handed circular polarized light (CPL). The photodetector is proven to be able to identify incident …