18-Norandrosta-8,11,13-trienes. Part II. Aromatisation of 18-norandrost-13-enes by bromination and dehydrobromination
Abstract
Bromination of 17,17-disubstituted-18-norandrost-13-enes (1) followed by dehydrobromination gave the corresponding 7,13-dienes (3), which on further bromination and dehydrobromination yielded the 8,11,13-trienes (8). The mechanism of the reaction including the involvement of the 17-substituents is discussed.