1160040-34-5Relevant academic research and scientific papers
Palladacyclic complexes containing C,N-type ligands as catalysts in cross-coupling reactions
Chen, Ming-Tsz,Huang, Chi-An,Chen, Chi-Tien
, p. 3142 - 3150 (2009/02/07)
Four ligand precursors, namely PhN=C(CMe2)(NPh)C=N(E) [E = -(CH2)2OMe (1); -(CH2)C(O)OMe (2); -(CH 2)2CH3 (3); -C6H5 (4)], are described. Treatment of 1, 2, 3 or 4 with 1-1.1 molar equivalents of Pd(OAc)2 in THF or CH3CN affords the orthometallated palladium(II) complexes [{[PhN=C(CMe2)-(N-η1-Ph)C=N(E) ]Pd(OAc)}2] [E = -(CH2)2OMe (5); -(CH 2)-C(O)OMe (6); -(CH2)2CH3 (7); -C6H5 (8)], respectively. The reaction of 5 or 6 with an excess of NaCl(aq.) in acetone affords the orthometallated palladium(II) complexes [{PhN=C(CMe2)(N-η1-Ph)C=N(E)}PdCl] [E = -(CH2)2OMe (9); -(CH2)C(O)OMe (10)], whereas the reaction of 7 with an excess of NaCl(aq.) in acetone affords the dinuclear palladium(II) complex [{[PhN=C(CMe2)(N-η1-Ph)C= N(CH2)2CH3]-PdCl}2] (11). The crystal and molecular structures of compounds 2, 4, 5, 7, 8 and 9 are reported The application of those novel palladacyclic complexes to the Suzuki and Heck reactions with aryl halide substrates is examined. Wiley-VCH Verlag GmbH & Co. KGaA, 2008.
