Kinetic resolution by copper-catalyzed azide–alkyne cycloaddition
摘要:
The use of chiral pybox ligands imparts enantioselectivity to the Cu-I-catalyzed azide-alkyne cycloaddition reaction, in the form of kinetic resolution of alpha-chiral azides and desymmetrization of gem-diazides. While levels of selectivity are modest, the results show unequivocally that the process benefits from ligand-accelerated catalysis. (c) 2005 Elsevier Ltd. All rights reserved.
A Convenient One-Step Method of Converting Electron-Rich Aromatic Aldehydes into Nitriles
作者:Hitomi Suzuki、Chie Nakaya
DOI:10.1055/s-1992-26185
日期:——
Electron-rich aromatic aldehydes react with sodium azide in the presence of aluminum chloride in boiling tetrahydrofuran to give the corresponding nitriles in good yields, while electron-deficient or hindered aromatic aldehydes lead to (diazidomethyl)arenes in moderate yield under similar conditions.
Kinetic resolution by copper-catalyzed azide–alkyne cycloaddition
作者:Jun-cai Meng、Valery V. Fokin、M.G. Finn
DOI:10.1016/j.tetlet.2005.05.019
日期:2005.7
The use of chiral pybox ligands imparts enantioselectivity to the Cu-I-catalyzed azide-alkyne cycloaddition reaction, in the form of kinetic resolution of alpha-chiral azides and desymmetrization of gem-diazides. While levels of selectivity are modest, the results show unequivocally that the process benefits from ligand-accelerated catalysis. (c) 2005 Elsevier Ltd. All rights reserved.