Scholl Reaction

R. Scholl, C. Seer, Ann. 394, 111 (1912).

Coupling of aromatic molecules by treatment with Lewis acid catalysts:

Review: C. D. Nenitzescu, A. T. Balaban in Friedel-Crafts and Related Reactions, vol. 2, part 2, G. Olah, Ed. (Wiley, New York, 1964) pp 979-1048; G. A. Clowes, J. Chem. Soc. C 1968, 2519; A. C. Buchanan et al., J. Am. Chem. Soc. 102, 5262 (1980).