I'm sure this must have been discussed before somewhere on this site, but I can't find it. Is anyone aware of the benzoxazole and benzimidazole analogues of MDMA or MDA having been studied. They have the H bond acceptors in the right place and are approximately the same bulk as the benzodioxole of MDMA. sadly the lipophilicity isn't quite right.
I have seen work on benzoxazole analogues of tryptamines but not 3,4 amphetamines.
most interest is the benzoxzole analog