“…was heated for 72 hr, a Meg-naphthalene (20, 20%) and a Mev-naphthalene (19, 2%), whose precursory role to the formation of 20 was confirmed independently, were obtained besides unreacted 18 (38%) and polymeric materials (40%). Both 19 and 20 were isolated and their structures determined as 1,2,3,4,5,6,7-ß7-and 1,2,3,5,6,7-Meg-naphthalene for 19 and 20, respectively, by spectroscopy joined with a rational mechanistic account. 10 Analogously, the main reaction of the following naphthalenes, none of which has any methyl substituents in peri positions, was the dealkylation.…”