[SVXX]

First of all, is this how these reactions proceed?
And secondly, if they do, why do they proceed like this? I thought all electrophilic aromatic substitutions occurred at positions of maximum electron density. There are other positions besides the one the second -R has attacked, and yet this is how these reactions have been given to proceed.
PS : I found this in one of my study packages. 2 mols of ROH have been used in both cases.

[orgopete]

…why do they proceed like this? I thought all electrophilic aromatic substitutions occurred at positions of maximum electron density.

This looks like a really good question. I hope someone can post some real data so we might be able to understand the parameters of this reaction. For example, it is known that alkyl groups can be rearranged in Friedel-Crafts types of reactions.
Is this general for all R-groups? How selective is this? Can you effect a 1,6-addition by starting with BF3 and then using AlCl3 for a second substitution reaction?

[SVXX]

They haven't given any other such reactions or what would happen otherwise(such as BF₃ first and AlCl₃ later) orgopete. My study material isn't so deep, unfortunately. I think this must be a general case for all alkyl groups, as cation rearrangement does not influence the site of attack. It merely generates different products as per different positions of the positive charge, and the most stable carbocation ends up giving the major product.
My worry is regarding the sites of attack of the alkyl cations. Why this and not some other sites?

[SVXX]

Some help here please?