Synthesis of 5-(2-methoxy-1-naphthyl)- and 5-[2-(methoxymethyl)-1-naphthyl]-11<i>H</i>-benzo[<i>b</i>]fluorene as 2,2'-disubstituted 1,1'-binaphthyls via benzannulated enyne–allenes
Beilstein journal of organic chemistry