15,16-Dihydro-11-trifluoromethylcyclopenta[a]phenanthren-17-one 7, an electronegative analogue of the strongly carcinogenic 11-methyl-17-ketone, is synthesised in three steps from 17,17-ethylenedioxy-11,12,13,14,15,16-hexahydrocyclopenta[a]phenanthren-11-one 3.
15,16-二氢-11-三
氟甲基环戊并[a]
菲-17-酮 7 是强致癌性 11-甲基-17-酮的电负性类似物,由 17,17-亚乙二氧基-11,12,13,14,15,16-六氢环戊并[a]
菲-11-酮 3 分三步合成。