A new palladium(II)-catalyzed [3,3] aza-Claisen rearrangement of 3-allyloxy-5-aryl-1,2,4-oxadiazoles
作者:Gianfranco Fontana、Antonio Palumbo Piccionello
DOI:10.1016/j.tetlet.2010.12.058
日期:2011.2
new efficient palladium(II)-catalyzed [3,3] aza-Claisen, formal sigmatropic rearrangement of 3-allyloxy-5-aryl-1,2,4-oxadiazoles was developed. The mechanism was studied by analyzing the regiochemical and stereochemical course of the reaction. The results obtained indicated the intervention of a cationic pallada-cycle similar to the one postulated for the Cope rearrangement of 1,5-dienes.
开发了一种新型的高效钯(II)催化的[3,3]氮杂-克莱森,3-烯丙氧基-5-芳基-1,2,4-恶二唑的正式σ重排。通过分析反应的区域化学和立体化学过程研究了该机理。获得的结果表明,阳离子pallada-循环的干预类似于为1,5-二烯的Cope重排所假定的循环。