Abstract
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. The conversion of aldehydes
into their corresponding acylals in the presence of H3PW12O40 and the
one-pot reactions of diveratrylmethanes with these acylals were also
used for the synthesis of symmetrical and unsymmetrical
9,10-diaryl-2,3,6,7-tetramethoxyanthracenes.
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