Cylisation reactions of 2-substituted biphenyl-2′-yldiazonium salts leading to O-alkyldibenzofuranium and S-alkyl-dibenzothiophenium salts: modified meerwein reagents

Abstract The preparation of 2-amino-2′-methoxybiphenyl and 2-amino-2′-thiomethoxybiphenyl and analogues and their transformation into diazonium salts and hence into dibenzofuranium and dibenzothiophenium salts is described together with their use as alkylating agents.