(IIlb), which was cleaved by strong base to the acid (VIIb). AII example is described of acylation of aliphatic carbon. The ease with which methyl fluorene-9-carboxfite anion reacts with a wide range of alkyl halides (1, 2, 3) together with the formation of phenanthrene derivatives from carbonium ions (I) prompted the investigations described in this paper. ... It has been reported (4) that 9-benzylfluorene-0-carboxylic acid chloride (IIa) was cyclized by aluminum chloride to the ...
