“…12,13 The 4,4'-bisstyrylquinoline precursors for DHI (5u, v) were obtained by condensation of lepidine with 4-quinolinecarboxaldehyde and terephthaladehyde in the presence of methanesulfonic acid. 14 addition was carried out by stirring for 96 h at room temperature in a dry diethyl ether solution in the absence of light (Scheme 1).…”