Thermal Rearrangement of Azido Ketones into Oxazoles via Azirines: One-Pot, Metal-Free Heteroannulation to Functionalized 1,3-Oxazoles
作者:Shailesh R. Shah、Sudhanva S. Navathe、Amol G. Dikundwar、Tayur N. Guru Row、Andrea T. Vasella
DOI:10.1002/ejoc.201201269
日期:2013.1
α-Azidoacetophenones were converted into 2-aryl-1,3-oxazole-4-carbaldehydes through rearrangement of the carbon framework upon exposure to DMF/POCl3. The unprecedented rearrangement occurs via alkenyl azides and 2H-azirines. A mechanism for this unusual reaction was proposed and evidenced.
α-叠氮基苯乙酮暴露于 DMF/POCl3 后,通过碳骨架的重排转化为 2-芳基-1,3-恶唑-4-甲醛。前所未有的重排通过烯基叠氮化物和 2H-氮丙啶发生。提出并证实了这种不寻常反应的机制。