/navarone/
Bluelighter
Fuck it. Just make beta-keto-PEAs. Figure out a way to make large quantities without forming the dimer in the process. If khat can do it, then you can do it.
As i said above beta ketos are very polar and have some more difficulty in crossing the BB than other peas, amphetamines thta is because the keto group is preetty lipophobic and the ether/MD group is more lipophilic.
Khat sux as a drug cause of this reason and also it is much more easely converted into a beta hydroxy PEA (like ephedrine) even before reacing the brain.
That is why methcathinone is much more efficent as a adrenergic stimulant, the methyl makes the molecule a bit more lipophilic and crosses the BBB less tediously.
I had some ponders about switching the keto with a sulphur..which would slow down a lot the metabolic process that eventually turns it into a hydroxy, though at the moment I am pretty ignorant on the lipohpilicity of double bonded sulphurs and their pros and cons compared to other common beta ketos.
On Wiki I've read many articles about thio analogues of phenylmethoxy amphetamines (mostly created by our beloved Shulgin) and in most cases the reports tell that this substitution causes stronger but more unpleasdant side effects.