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Synthesis 2008(21): 3473-3477
DOI: 10.1055/s-0028-1083155
DOI: 10.1055/s-0028-1083155
PAPER
© Georg Thieme Verlag
Stuttgart ˙ New York
Efficient Copper-Catalyzed Coupling of 2-Haloacetanilides with Phosphine Oxides and Phosphites under Mild Conditions
Weitere Informationen
Publikationsverlauf
Received
14 May 2008
Publikationsdatum:
25. September 2008 (online)


Abstract
We have developed a highly efficient method for the copper-catalyzed coupling of 2-haloacetanilides with phosphine oxides and phosphites in the presence of a catalytic amount of copper(I) iodide and N-methylpyrrolidine-2-carboxamide under mild conditions (45-55 ˚C); the P-arylation products were synthesized in good to excellent yields in short times using 2-bromotrifluoroacetanilides and 2-iodotrifluoroacetanilides as the starting materials. This represents the lowest reaction temperatures for copper-catalyzed P-arylation thus far.
Key words
Ullmann reaction - P-arylation - ortho effect - copper catalysis - N,N-ligand