SEARCH Articles Figures Tables Electrocyclic rearrangements Electrocyclization sigmatropic rearrangement Rearrangement reactions 2,3]-sigmatropic rearrangements Rearrangement reactions rings Rearrangement reactions sigmatropic Rearrangement ring-opening Ring electrocyclic Ring opening reactions Ring rearrangements Sigmatropic -rearrangements rearrangement Sigmatropic reaction Sigmatropic rearrangements electrocyclic