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Synthesis of liquid crystals using Suzuki-Miyaura coupling reactions using mesoporous, ligand-free Pd/Si^sub 3^N^sub 4^ catalysts in aqueous media
Ist Teil von
Liquid crystals, 2011-08, Vol.38 (8), p.1027
Ort / Verlag
Abingdon: Taylor & Francis Ltd
Erscheinungsjahr
2011
Link zum Volltext
Quelle
Taylor & Francis Journals Auto-Holdings Collection
Beschreibungen/Notizen
We report a ligand-free Pd/Si...N... catalysed Suzuki-Miyaura aryl-aryl cross-coupling reaction using mixtures of water-miscible solvents, such as dimethoxyethane, ethanol and isopropanol with water and several bases, such as sodium carbonate and potassium phosphate. The reaction time and catalyst concentration were optimised and the heterogeneous nature of the reaction was investigated. The optimised reaction conditions were used to synthesise a standard liquid crystal using environmentally friendly solvents and a Pd/Si3N4 catalyst. This reaction is scalable to produce larger quantities. (ProQuest: ... denotes formulae/symbols omitted.)