For example, 2-(p-methoxyphenyl)-3-ethyl-6-methoxyindene (V) may, theoretically, be derived from 4, 4'-dimethoxy-a-rnethyl-~-ethylstilbene by ring closure between the methyl group and a phenyl ring. Because of this structural relationship, a number of 2-phenylindene derivatives were synthesized by Salzer2a and Solmssen. 2b This earlier work, recently reviewed, s found that the most active 2-phenylindenes with phenolic hydroxy groups had ...
