The cycloacylation - 1,3-Acylrearrangement sequence as tool for highly substituted pyrrolones
作者:Gunther Buehrdel、Rainer Beckert、Birgit Friedrich、Helmar Goerls
DOI:10.1002/jhet.5570450332
日期:2008.5
e 9 and cyclohexanone 12 immediately lead to highly substituted pyrrolones 11 and 14. Obviously, the primarily formed cyclization products undergo a very fast 1,3-acyl rearrangement (Dimroth-/Mumm-Rearrangement). The structures of the maleiimide 11 and the indolone 14 were determined by single crystal X-ray structure analysis. Due to its amino/imino substructure, compound 3 is an efficient ligand for
研究了具有不同CH-酸度的双亚氨基酰氯1与酮之间的环化反应。二苯丙酮2在温和的条件下通过预先形成的烯醇的C,O-环化反应生成亚氨基呋喃衍生物3。在用三氟乙酸处理后,后者可以定量地重新排列到吡咯烷酮5中。相反,1,3-丙酮二羧酸酯9和环己酮12立即生成高度取代的吡咯烷酮11和14。显然,最初形成的环化产物会经历非常快的1,3-酰基重排(Dimroth- / Mumm-重排)。通过单晶X射线结构分析确定马来酰亚胺11和吲哚酮14的结构。由于其氨基/亚氨基亚结构,化合物3是金属络合反应的有效配体,以两种不同的Zn络合物7和8的合成为例。