Steroidal 1-methyl-3,4-naphthoquinones
Abstract
Dienone–phenol rearrangement of steroidal 1,4,6-triene-3,11-diones gives 1-methyl-AB-aromatic steroids, which are oxidised by potassium nitrosodisulphonate to the title compounds. The instability of these quinones is ascribed to their quinone methide character.