A practical method for using alkoxide-accelerated vinylcyclobutane ring expansions in the synthesis of six-membered rings. Unexpected orbital symmetry allowed and forbidden 1,3-sigmatropic rearrangements
A practical method for using alkoxide-accelerated vinylcyclobutane ring expansions in the synthesis of six-membered rings. Unexpected orbital symmetry allowed and forbidden 1,3-sigmatropic rearrangements