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Communication | Regular issue | Vol 24, No. 5, 1986, pp.1233-1236
Published online, 1st January, 1970
DOI: 10.3987/R-1986-05-1233
Preparation of Naphthalene Derivatives by Reaction of Benzynes with Thiophene-1,1-dioxides

Juzo Nakayama,* Masami Kuroda, and Masamatsu Hoshino

*Department of Chemistry, Faculty of Science, Saitama University, Saitama, Saitama 338-8570, Japan


The reaction of benzynes with thiophene 1,1-dioxides affords the Diels-Alder cycloadducts which spontaneously lose sulfur dioxide to give the corresponding naphthalene derivatives in moderate yields. Further reaction of benzyne with naphthalenes yielding dibenzobarrelenes is observed in a few cases.