Cycloadditions in syntheses. XXXVI. 6-Hydroxy-1,2-dihydrocyclobuta [a] naphthalene-2-carboxylic acid: a new synthon for A,B-ring aromatized steroids.

A synthetic method of 6-hydroxy-1,2-dihydrocyclobuta[a]naphthalene-2-carboxylic acid as well as a new methodology for the synthesis of A,B-ring aromatized steroids from its 6-deoxy derivative are elaborated.