Lewis acid reversal of the torquoselectivity of the electrocyclic ring opening of 3-acetylcyclobutene
作者:Satomi Niwayama、K.N. Houk
DOI:10.1016/s0040-4039(00)91766-0
日期:1993.2
Thermolysis of 3-acetylcyclobutene resulted in a mixture of E-and Z-dienes, favoring slightly the E-diene, in accord with theoretical prediction. This preference was reversed by the Lewis acid, ZnI2, also predicted by ab initio calculations on a model system.