Department of Chemistry, University of Rochester, Rochester, NY 14627, USA.
Angew Chem Int Ed Engl. 2011 Nov 11;50(46):10981-5. doi: 10.1002/anie.201104870. Epub 2011 Sep 26.
Highly functionalized cyclopentenones are prepared stereospecifically based on a chemoselective copper(II)-mediated Nazarov/Wagner-Meerwein rearrangement sequence. After the initial 4π electrocyclization, this reaction involves two sequential [1,2]-migrations depending upon both migratory ability and steric bulk of the substituents at C1 and C5. This sequence can be achieved by using a catalytic quantity of copper(II) in combination with a weak Lewis acid. The mechanism of the reaction is also supported by DFT computations.
高官能化的环戊烯酮可通过选择性铜(II)介导的 Nazarov/Wagner-Meerwein 重排序列立体特异性制备。在初始的 4π 电环化之后,该反应涉及两个连续的[1,2]-迁移,这取决于 C1 和 C5 位取代基的迁移能力和空间位阻。通过使用催化量的铜(II)与弱路易斯酸结合,可以实现此序列。反应的机理也得到了 DFT 计算的支持。