Intermolecular and Selective Synthesis of 2,4,5-Trisubstituted Oxazoles by a Gold-Catalyzed Formal [3+2] Cycloaddition
作者:Paul W. Davies、Alex Cremonesi、Lidia Dumitrescu
DOI:10.1002/anie.201103563
日期:2011.9.12
Oxazole new world: A gold‐catalyzed intermolecular reaction of pyridine‐N‐aminides with ynamides can be used to prepare trisubstituted 1,3‐oxazoles with a variety of functional groups. This formal [3+2] cycloaddition employs robust conjugated N‐ylides as N‐nucleophilic N‐acyl nitrene equivalents for a highly chemoselective and regioselective addition across electron‐rich CC triple bonds.
恶唑新世界:吡啶-N-氨基化物与乙酰胺的金催化分子间反应可用于制备具有各种官能团的三取代的1,3-恶唑。这种正式的[3 + 2]环加成反应使用了健壮的共轭N-酰亚胺作为N-亲核N-酰基氮烯等效物,可在富电子的CC三键上实现高度化学选择性和区域选择性加成。