Ar. Katritzky et al., BENZOTRIAZOLYLALKYLATION OF AROMATIC-COMPOUNDS BY 1-BENZENESULPHONYLBENZOTRIAZOLE AND SYNTHESIS OF TRIARYLMETHANES, Heterocycles, 38(2), 1994, pp. 345-356
Mesitylene, 2-methoxynaphthalene, 1,3,5-trimethoxybenzene, xylene and
anisole were all benzotriazolylalkylated by treatment with 1-(benzenes
ulphonyl)benzotriazole and an aromatic aldehyde. Upon displacement of
benzotriazole, the functionalized aromatic compounds were transformed
into asymmetrically trisubstituted methanes and functionalized indoles
.