and Acetyl Shifts in Diels-Alder Adducts of 2-Acetyl-6-methyl-1,4-benzoquinone
Treatment of the Diels-Alder adduct 4a-acetyl-4a,5,8,8a-tetrahydro-3-methyl-1,4-naphthoquinone with pyridine-methanol or acetic anhydride leads to a acetyl shift to the 3-position which can be followed by a acetyl shift to the 2-position (adduct numbering).
Ahmad, Faujan B. H.,Bruce, J. Malcolm,Khalafy, Jabbar,Sabetian, Khojasteh