abstract |
Process for prepn. of steroids with ring A of general formula I (i) Suitable polycyclic aromatic hydrocarbons-biphenyl, naphthalene, methyl naphthalene, phenanthrene, or terphenyl. (ii) A cpd. added to selectively remove alkali methyl e.g. Ph2CH2 or methylnaphthalene improves the yield. (iii) Alkali metal pref. Li, esp. dispersed in paraffin. |