41267-76-9Relevant articles and documents
Permethylated NHC-Capped α- and β-Cyclodextrins (ICyDMe) Regioselective and Enantioselective Gold-Catalysis in Pure Water
Zhu, Xiaolei,Xu, Guangcan,Chamoreau, Lise-Marie,Zhang, Yongmin,Mouriès-Mansuy, Virginie,Fensterbank, Louis,Bistri-Aslanoff, Olivia,Roland, Sylvain,Sollogoub, Matthieu
supporting information, p. 15901 - 15909 (2020/10/12)
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.
A mild titanium-catalyzed synthesis of functionalized amino coumarins as fluorescence labels
Wirtz, Lisa,Kazmaier, Uli
supporting information; experimental part, p. 7062 - 7065 (2012/01/05)
In contrast to Bronsted and other Lewis acids ClTi(OiPr)3 is especially suited to catalyze the formation of amino-substituted coumarins from aminophenols and functionalized β-oxo esters in a Pechmann condensation. This straightforward protocol allows the synthesis of fluorescence labels and false fluorescent neurotransmitters.
Pyrylium dyes having a fused rigidized nitrogen-containing ring
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, (2008/06/13)
A class of pyrylium dyes, having at least one rigidized, nitrogen-containing heterocyclic ring fused thereto is described. The rigidized dyes are useful lasing components in lasing media.