Naphth- and naphthazulenes were synthesized by dehydrogenation of 5,6-dihydronaphth- and 5,12 dihydronaphthazulenes which were obtained by the reaction of 2H-cycloheptafuran-2-one with 1- and 2-pyrrolidinyl-3,4-dihydronaphthalenes, respectively.
Yasunami, Masafumi,Yang, P. W.,Kondo, Yukio,Noro, Yukio,Takase, Kahei