A convenient preparation of cyclohepta-2,4-dienone: isomerisation of protonated cyclohepta-3,5-dienone to protonated cyclohepta-2,4-dienone
Abstract
Protonated cyclohepta-3,5-dienone has been shown to isomerise cleanly to protonated cyclohepta-2,4-dienone in FSO3H at +10°; quenching of the acid solution affords a convenient preparation of cyclohepta-2,4-dienone.