A Superior Non-Symmetrical NCP Pincer Type Palladacycle Catalyst Precursor for the Coupling of Aryl Boronic Acids with Aryl Chlorides
作者:Jairton Dupont、Adriano L. Monteiro、Gilber R. Rosa、Gunter Ebeling
DOI:10.1055/s-2003-44352
日期:——
The air and water stable non-symmetrical pincer palladacycle [Me2NCH2(Cl)C=C(CH2)2OP(i-Pr)2-kNkCkP]PdCl 5, easily prepared from the chloropalladation of the hetero-substituted alkyne Me2NCH2C≡C(CH2)2OP(i-Pr)2, is a highly efficient catalyst precursor for the coupling of aryl boronic acids and aryl chlorides. Both electron-rich and electron-poor aryl chlorides are efficiently coupled in the presence of 5 to furnish the corresponding cross-coupled products in excellent yields, and a wide variety of functional groups are tolerated in both aryl chloride and aryl boronic acid.
A mixed NCP pincer palladacycle as catalyst precursor for the coupling of aryl halides with aryl boronic acids
作者:Gilber R. Rosa、Clarissa H. Rosa、Frank Rominger、Jairton Dupont、Adriano L. Monteiro
DOI:10.1016/j.ica.2005.11.031
日期:2006.4
Abstract The reaction of phosphinite Me2NCH2C C(CH2)2OP(i-Pr)2 (2) with Li2PdCl4 in methanol at room temperature affords the air and water stable mixedpincerpalladacycle (Me2NCH2(Cl)C C(CH2)2OP(i-Pr)2-κNκCκP)PdCl (3) whose structure has been ascertained by means of an X-ray diffraction study. This pincerpalladacycle is a highly efficient catalystprecursor for the coupling of aryl boronic acids