H3PW12O40-catalysed alkylation of arenes and diveratrylmethanes: Convenient routes to triarylmethanes and to symmetrical and unsymmetrical 9,10-diaryl-2,3,6,7-tetramethoxyanthracenes

Article abstract of DOI:10.1002/ejoc.201001267

An efficient method for the synthesis of triarylmethanes and difurylarylmethanes through solventless reactions between aldehydes and arenes in the presence of H₃PW₁₂O₄₀ as a reusable catalyst under thermal and microwave irradiation conditions has been developed. H₃PW₁₂O₄₀-catalysed one-pot consecutive Friedel-Crafts reactions between veratrole and aldehydes were also applied as a convenient protocol for the preparation of symmetrical 9,10-diaryl-2,3,6,7- tetramethoxyanthracenes.