Pyridazine derivatives. Part 39: Reactivity of 5-iodopyridazin-3(2H)-ones in palladium-catalysed reactions
作者:Alberto Coelho、Eddy Sotelo、Héctor Novoa、Oswald M. Peeters、Norbert Blaton、Enrique Raviña
DOI:10.1016/j.tet.2004.10.014
日期:2004.12
antiplatelet agents, convenient and efficient methods for the preparation of 2,5-disubstituted pyridazin-3(2H)-ones are reported that utilise palladium-catalysed cross-coupling reactions. A post-coupling base-promoted isomerisation has been observed during Sonogashira alkynylation of 5-iodopyridazin-3(2H)-ones (3) with 1-phenyl-2-propyn-1-ol. Variable amounts of phthalazinones were isolated as by-products during