Melamine trisulfonic acid: A new efficient catalyst for the synthesis of aryldithienylmethanes
An efficient method has been developed for the synthesis of dithienylmethanes via bisarylation of aldehydes with thiophene in the presence of melamine trisulfonic acid as a catalyst under solvent-free conditions.
Wu, Liqiang,Yan, Yunhui,Yan, Fulin
experimental part
p. 149 - 154
(2012/02/16)
Unique versatility of Amberlyst 15. An acid and solvent-free paradigm towards synthesis of bis(heterocyclyl)methane derivatives
Bis(heterocyclyl)methanes, key intermediates for a variety of chemical, biochemical and material science relevant targets, have been obtained in a synthetically useful manner using Amberlyst 15 ion-exchange resin. This method promises versatility, cost-ef