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Treatment of 1,8-Dihydroxy-naphthaline with bromochloromethane/K 3 CO 3  in DMF gives Naphtho[1,8-de]-1,3-dioxine (1a) in good yield. The bromo (1b) and nitro compound (1c) can be obtained free of isomorics by electrophilic substitution of la. Bromolithium exchange of 1b leads to a lithium organic compound, which possibles the synthesis of alkyl-, olefinic-, and carboxylic derivatives of the substrate 1a.

Über Naphtho[1.8-de]-1,3-dioxine / Naphtho[1,8-de]-1,3-dioxines