Lewis Acid-Catalyzed Isomerization of 2-Arylcyclopropane-1,1-dicarboxylates: A New Efficient Route to 2-Styrylmalonates
作者:Alexey O. Chagarovskiy、Olga A. Ivanova、Eduard R. Rakhmankulov、Ekaterina M. Budynina、Igor V. Trushkov、Mikhail Ya. Melnikov
DOI:10.1002/adsc.201000636
日期:2010.12.17
A facile efficient approach to the 2-styrylmalonates via the Lewis acid-catalyzedisomerization of 2-arylcyclopropane-1,1-dicarboxylates has been developed. The efficiency of this method was demonstrated for a representative series of such cyclopropanes. The isomerization proceeds chemo-, regio- and stereoselectively to afford E-styrylmalonates in good yields.
novel method for synthesizing seven‐membered ring carbocycles via a palladium‐catalyzed intramolecular allylic alkylation–isomerization–Cope rearrangement cascade. DFT calculation for the seven‐membered ring formation step suggested that, in addition to the reaction cascade including the conventional Cope rearrangement, there is another possible pathway via retro‐cyclopropanation.