Permethylated NHC‐Capped α‐ and β‐Cyclodextrins (ICyD Me ) Regioselective and Enantioselective Gold‐Catalysis in Pure Water
Chemistry: A European Journal(2020)
摘要
A series of water-soluble encapsulated copper(I), silver(I) or gold(I) complexes based on NHC-capped permethylated cyclodextrins (ICyDMe ) were developed and used as catalysts in pure water for hydration, lactonization, hydroarylation and cycloisomerization reactions. ICyDMe ligands gave cavity-based high regioselectivity in hydroarylations, and high enantioselectivities in gold-catalyzed cycloisomerizations reactions giving up to 98 % ee in water. These ICyDMe are therefore useful ligands for selective catalysis in pure water.
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关键词
gold‐catalysis,regioselective
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