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DOI: 10.1055/s-0029-1217958
Facile CuI-Catalyzed Arylation of Azoles and Amides Using Simple Enaminones as Efficient Ligands
Publication History
Publication Date:
04 September 2009 (online)
Abstract
(E)-3-(Dimethylamino)-1-(2-hydroxyphenyl)prop-2-en-1-one was found to be an excellent ligand for copper-catalyzed N-arylation of azoles and amides with aryl halides under mild conditions. The reaction took place at 82 ˚C in MeCN with broad functional-group compatibility. A combination of the ligand and CuI proved to be an efficient catalytic system to promote the coupling reactions of aryl halides with azoles and amides.
Key words
copper - ligand - azoles - amides - arylation
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- Supporting Information
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References and Notes
General Procedure
All
chemicals were obtained from commercial source and used without
further purification. A stirred suspension of aryl halides (0.5
mmol), azoles or amides (0.5 mmol), CuI powder (0.05 mmol), Cs2CO3 (1.0
mmol), and L5 (0.1 mmol) in MeCN was refluxed
for 12 h (monitored by TLC) under nitrogen. After the mixture was
cooled to r.t., the MeCN was removed in vacuo. The solid was then
extracted with EtOAc (3 × 10 mL), washed
with H2O (3 × 10 mL), and dried
over Na2SO4. After the solvent was removed,
the crude mixture was purified by silica gel column chromatography to
provide the desired product.