acid (HCl, 36%, w/w, aqueous solution), and
ethanol absolute (C2H5OH, 99.99%) were purchased
from Alfa Aesar. 2-Fluorobenzylamine (C7H8NF,
97%), 3-fluorobenzylamine (C7H8NF, 97%), and
4-fluorobenzylamine (C7H8NF, 98%) were purchased
from Fluorochem. All chemicals were directly used without further
purification.