Modern Friedel-Crafts chemistry. Part-29. Cyclialkylation of some triphenylated propane, butane and pentane substrates to diphenylated indans under Friedel-Crafts conditions

Reactions under FrIedel-Crafts cyclialkylation conditions produced : isomeric 1,2-diphenylindans from 1,2,3-triphenyl-(1. or 2-)propanol and 1-chloro.1,3,3-triphenylpropane, (trans-2-benzyl-1-phenylindan from 2-benzyl-1,3-diphenyl-2-propanol, isomeric 1-methyl-1,2-diphenylindans from 2,3,4-triphenyl-2-butanol, 1,1-dimethyl-3,4-diphenylindan from 2-methyl-3,4,4-triphenyl-2-butanol, and isomeric 1-ethyl-1,3-diphenylindans from 1,1,3-triphenyl-3-pentanol. Mechanistic interpretations and product identifications are offered.