The following is of course only a synthetic outline. I realize that there are not enough details to actually perform this reaction simply by reading this post. However, they could easily be looked up for a fee on Beilstein or equivalent I would imagine.
Toluene (or ethylbenzene or cinnamon oil for that matter) is refluxed in HNO3 and H2SO4 to yield (in the case of toluene) 2,4,6-trinitrotoluene which is then reduced with Sn and HCl to 2,4,6-triaminotoluene which then undergoes a diazotization reaction with HNO2 (nitrous acid; made by reacting sodium nitrite with sulfuric acid). Next, the resulting intermediate is treated with hot, aqueous HCl or H2SO4 (the Sandmeyer reaction, I believe) and
O-trimethylated with either dimethylsulfate or CH3I in MeOH.
The 2,4,6-trimethoxy-1-methylbenzene is then oxidized with KMnO4 to 2,4,6-trimethoxybenzoic acid, reacted with SOCl2, reduced with lithium aluminum tri-tert-butoxide hydride in ether, condensively reduced with EtNO2 and ammonium acetate, and finally reduced with LAH and cyrstallized with HCl and ether to yield TMA-6 hydrochloride.
If the aryltridiazonium ion intermediate is reacted with CuCl or CuBr instead of H2O in hot acid, then 2,4,6-trichloroamphetamine or 2,4,6-tribromoamphetamine, both pharmacological unknowns as far as I know, would result (provided that a minimum of LAH were used in the final reduction so as not to tear off the aromatic halogens).
Also, it may be possible to use amphetamine instead of toluene as the precursor, provided the the amine be protected (and later deprotected via acid or base hydrolysis) with acetic anhydride, acetyl chloride or even propionyl chloride.
Again, I'm not exactly sure. I just know that a lot of people are bored with the same old, same old meth and
mdma, and with acid being as scarce as it seems to be,
TMA-6 would be a welcome diversion IMO.
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Just my 6th cents.