Abstract Two preparative chemical methods for aromatization of 19-nor-Δ 4-3-oxosteroids are described. The first method consist of an oxidative aromatization of 19-nor-Δ 4-3- oxosteroids with iodine-ceric ammonium nitrate in methanol to give a mixture of 3-methoxy ring-A aromatized derivatives consisting of the desired product, the Δ 9, 11 derivative, the 6- oxo derivative as well as some ring-A iodinated material. Conversion of this material to a ...
