Access to acridones by tandem copper(<scp>i</scp>)-catalyzed electrophilic amination/Ag(<scp>i</scp>)-mediated oxidative annulation of anthranils with arylboronic acids
An efficient and practical approach for the synthesis of medicinally important acridones was developed from anthranils and commercially available arylboronic acids by a tandem copper(I)-catalyzed electrophilic amination/Ag(I)-mediated oxidative annulationstrategy. This new and straightforward protocol displayed a broad substrate scope (25 examples) and high functional group tolerance. What's more
Acridone‐Benzimidazole Ring‐Fused Ligands: A New Class of Sensitizers of Lanthanide Luminescence via Low‐Energy Excitation
作者:Emmanuel Deiters、Frédéric Gumy、Jean‐Claude G. Bünzli
DOI:10.1002/ejic.200901148
日期:2010.6
investigations conducted in the same solvent demonstrate that ligand HLAB1 sensitizes europium luminescence (Q(Eu)(L) = 10% and tau(Eu) = 0.93 ms) whereas ligand HLAB2 sensitizes the luminescence of NIR-emitting Ln(III) ions, in particular Yb-III (Q(Yb)(L) = 0.86 % and tau(Yb) = 29.3 mu s). The sensitization efficiencies eta(sens) of both ligands have been determined for these two complexes and found to
Processes and synthetic intermediates for preparing N-arylacridancarboxylic acid derivatives
申请人:——
公开号:US20010031869A1
公开(公告)日:2001-10-18
Synthetic processes and intermediates are disclosed for the preparation of N-arylacridancarboxylic acid derivatives. The derivatives are esters, thioesters, amides and sulfonimides. A key feature of the processes is the preparation of N-aryl substituted intermendiates by formation of a bond between the nitrogen atom of the acridan ring and a carbon atom of another aromatic or heteroaromatic ring compound. The arylation reaction is catalyzed by a palladium catalyst. The N-arylacridancarboxylic acid derivatives are useful in methods for producing light and in assays for peroxidase enzymes and enzyme inhibitors and in assays employing enzyme-labeled specific binding pairs.
Processing and synthetic intermediates for preparing N-arylacridancarboxylic acid derivatives
申请人:Lumigen, Inc.
公开号:US06410732B2
公开(公告)日:2002-06-25
Synthetic processes and intermediates are disclosed for the preparation of N-arylacridancarboxylic acid derivatives. The derivatives are esters, thioesters, amides and sulfonimides. A key feature of the processes is the preparation of N-aryl substituted intermediates by formation of a bond between the nitrogen atom of the acridan ring and a carbon atom of another aromatic or heteroaromatic ring compound. The arylation reaction is catalyzed by a palladium catalyst. The N-arylacridancarboxylic acid derivatives are useful in methods for producing light and in assays for peroxidase enzymes and enzyme inhibitors and in assays employing enzyme-labeled specific binding pairs.
3-Hydroxy-N-methylacridinium iodide (Ac+OH) oxidized alcohols with the aid of potassium t-butoxide, whereas N-methylacridinium iodide (Ac+) could not oxidize alcohols under the same reaction conditions. The results indicate that the 3-hydroxyl group is crucial in modifying an N-methylacridinium nucleus as an NAD+ model oxidizing agent.