Reaction of 10, 1 0-dimethyl-9, I 0-dihydrophenanthrene-9-one (V), 2, 2- dimethylacenaphthenon\!(IX), IO-oxospiro [anthracene-9 (10H), I'-cyclopropane](XV), 6- acetylnerolin and 6-propionylnerolin with 3-dimethylaminopropylmagnesiurri chloride was used for the preparation of tbe corresponding tertiary alcohols, the dehydration of which led in tbree cases to the expected olefinic bases IV, XXI and XXll.. Dehydration of the ...