“…Traditionally, the Friedel-Crafts reaction and Baeyer condensation have been two of the most commonly employed tools for the formation of TRAMs in the presence of different promoters. Several promoters have been reported, as shown in Scheme 1, including protic acid (TsOH, 7 TfOH 8 ), Lewis acid (FeCl 3 , 9 TiCl 4 , 10 NbCl 5 , 11 SbCl 3 , 12 AlCl 3 , 13 AuCl 3 , 14 CuCl 2 , 15 SnCl 4 , 16 ZrOCl 2 17 ), acidic polymer (NKC-9, 18 Amberlyst-15, 19 Nafion-H 20 ), oxidant (NaICl 2 , 21 I 2 22 ), clay (K10), 23 ionic liquid, 24 microwave irradiation, and sonication. 25 Scheme 1 Synthetic routes of triarylmethanes (TRAMs)…”