“…Mechanistic rationale of Amidoalkyl-2-naphthols. or acetamides or acetonitrile in the presence of inorganic catalyst Ce(SO 4 ) 2 , [12] CeCl 3 ⋅ 7H 2 O, [25] Fe(HSO 4 ) 3 , HClO 4 -SiO 2 , [26] Al 2 O 3 -SO 3 H, [27] N-Bromo succinamide, [28] silica-supported molybdatophosphoric acid, [29] ytterbium triflate Yb(OTf) 3 , [30] and some organic catalyst triethyl benzyl ammonium chloride, [31] TMSCl/ NaI, [32] thiamine hydrochloride, [33] tetrachlorosilane, [34] succinic acid [35] and triflic acid, [36] deep eutectic solvent ([Choli-neCl][ZnCl2]3), [37] tannic acid, [38] zinc oxide nano particles, [39] and sulfanilic acid, [40] etc.…”