Regarding amine protection and why its there, the use of triflouroacetamide in the above synthesis is as was not for the bromination but for the subsequent aromatization with dichlorodicyanobenzoquinone which is a powerful oxidant. Which is all covered in this paper;
A Novel (Benzodifuranyl)aminoalkane with Extremely Potent Activity at the 5-HT2A Receptor1
Matthew A. Parker, Danuta Marona-Lewicka,
Virginia L. Lucaites,† David L. Nelson,† and
David E. Nichols*
J. Med. Chem. 1998, 41, 5148-5149
http://www.unc.edu/~dlinz/Papers/A%20Novel%20(Benzodifuranyl)aminoalkane.pdf
A Novel (Benzodifuranyl)aminoalkane with Extremely Potent Activity at the 5-HT2A Receptor1
Matthew A. Parker, Danuta Marona-Lewicka,
Virginia L. Lucaites,† David L. Nelson,† and
David E. Nichols*
J. Med. Chem. 1998, 41, 5148-5149
http://www.unc.edu/~dlinz/Papers/A%20Novel%20(Benzodifuranyl)aminoalkane.pdf