Abstract Oxidative treatment of anion 11 (obtained by deprotonation of 6, 6- dimethylpentafulvene 10, Scheme 3) with CuCl 2 gives a very complex mixture of coupling products 13 (18%), 14 (16%), 15 (36%), 16 (5%), and 17 (6%)(Scheme 4 and Table 2). These results show that the reactive intermediate obtained by oxidation of 11 (which is believed to be the fulvenyl radical 12) has several reactive sites. According to the ...
