Palladium-Catalyzed Coupling of Oxazol-2-yl- and 2-Oxazolin-2-yltrimethylstannanes with Aromatic Halides. A New Entry to 2-Aryl and 2-Heteroaryl Oxazoles and Oxazolines
作者:Alessandro Dondoni、Giancarlo Fantin、Marco Fogagnolo、Alessandro Medici、Paola Pedrini
DOI:10.1055/s-1987-28047
日期:——
4-Methyloxazole and 4,4-dimethyl-2-oxazoline were treated with n-butyllithium and trimethyltin chloride to give the corresponding 2-trimethylstannyl derivatives which in the presence of tetrakis(triphenylphosphine)palladium(0) as a catalyst undergo cross-coupling reactions with various aryl and heteroaryl halides to give 2-aryl and 2-heteroaryl oxazoles and oxazolines in high yields.
4-甲基恶唑和4,4-二甲基-2-恶唑啉用正丁基锂和三甲基氯化锡反应得到相应的2-三甲基甲锡烷基衍生物,在四(三苯基膦)钯(0)催化剂存在下发生交叉偶联与各种芳基和杂芳基卤化物反应,以高产率得到2-芳基和2-杂芳基恶唑和恶唑啉。