A highly effective azetidine–Pd(II) catalyst for Suzuki–Miyaura coupling reactions in water
作者:Dong-Hwan Lee、Young Hoon Lee、Dong Il Kim、Yang Kim、Woo Taik Lim、Jack M. Harrowfield、Pierre Thuéry、Myung-Jong Jin、Yu Chul Park、Ik-Mo Lee
DOI:10.1016/j.tet.2008.05.093
日期:2008.7
Readily-synthesised, water-stable Pd(II) complexes of azetidine-based tridentate ligands have been studied as catalysts for the Suzuki-Miyaura coupling reaction. They are highly active for the coupling of aryl bromides with aryl boronates and also effective for the coupling of aryl chlorides. (c) 2008 Elsevier Ltd. All rights reserved.
Functionalised azetidines as ligands: species derived by selective alkylation at substituent-nitrogen
tridentate ligand 1-(2-aminoethyl)-3-methyl-3-(2-pyridyl)azetidine at its terminal amino-nitrogen atom can be readily achieved by both reductive alkylation and simple alkylation reactions to give tri-, quadri-, quinque- and sexi-dentate derivatives. Simple alkylation by 2-picolinyl chloride provides the only example of a second reaction pathway where the azetidine ring of the reactant has undergone activation