Synthesis of Melatonin Analogues Derived from Furo[2,3-b]- and [2,3-c]pyridines by Use of a Palladium-Copper Catalyst System
作者:Marie-Claude Viaud-Massuard、Hervé Van de Poël、Gérald Guillaumet
DOI:10.3987/com-01-9363
日期:——
5-Substituted furo[2,3-b]pyridine was synthesised by palladium-catalyzed reaction of 5-bromo-2-hydroxy-3-iodopyridine and phenylacetylene with (Ph 3 P) 2 PdCl 2 , Cul in Et 3 N. A carbonylative cyclization of 5-hydroxy-2-methoxy-4-(2-phenylethynyl)pyridine with carbon monoxide in methanol with PdCl 2 , CuCl 2 under basic conditions, has been accomplished to prepare methyl 2,5-substituted furo[2,3-c]pyridine-3-carboxylate
2,3,5-取代呋喃[2,3-b]吡啶由钯催化的5-溴-2-羟基-3-碘吡啶和苯乙炔与(Ph 3 P) 2 PdCl 2 , Cul in Et 反应合成3 N. 5-羟基-2-甲氧基-4-(2-苯基乙炔基)吡啶与一氧化碳在甲醇中与PdCl 2 、CuCl 2 在碱性条件下的羰基环化反应制备甲基2,5-取代呋喃[2,3-c]吡啶-3-羧酸盐。