Sökning: "absolute asymmetric synthesis"
Visar resultat 6 - 9 av 9 avhandlingar innehållade orden absolute asymmetric synthesis.
6. Breaking the symmetry: creation and transfer of optical activity via total spontaneous resolution and stereoselective reactions
Sammanfattning : The generation of optical activity from achiral or racemic precursors – absolute asymmetric synthesis – is discussed in relation to the origin of biomolecular homochirality but is also often (incorrectly) regarded as being impossible. One approach to absolute asymmetric synthesis is the use of compounds that form chiral crystals. LÄS MER
7. Dynamic Chemistry for Asymmetric Synthesis, Molecular Motion and Constitutional Exchange
Sammanfattning : Living matter is built on complex dynamic systems consisting of numerus biotransformations. By exploiting the adaptive and evolutive behaviors ofmolecular matter, dynamic chemistry has developed as an important tool tounderstand the organization of nonliving matter into complex living systems. LÄS MER
8. Creating Optical Activity: Total Spontaneous Resolution and Viedma Ripening
Sammanfattning : The creation of optical activity has been considered as something impossible even though reports of such creation via total spontaneous resolution since the 1940´s have been published. More recently Viedma ripening have been developed that also produce enantiopure bulk product. Both methods are examples of absolute asymmetric synthesis i.e. LÄS MER
9. Asymmetric hydrogenation of allylic alcoholsusing iridium catalysts
Sammanfattning : The first part of this thesis is focussed on the enantioselective iridium catalyzeda symmetric hydrogenation of allylic alcohols. The study involved the preparation of a range of allylic alcohols. LÄS MER