Patent US6479479 (http://l2.espacenet.com/dips/viewer?PN=US6479479&CY=gb&LG=en&DB=EPD)
1-2-3 ACiD
...because noone at the Hive has ever used any route going through (MD)P2Pol, that is besides Siegfried - https://www.thevespiary.org/rhodium/Rhodium/chemistry/mdma.tosylate.html (https://www.thevespiary.org/rhodium/Rhodium/chemistry/mdma.tosylate.html)
The reason for this is the existance of safrole (as long as that is available, pepple in general aren't going to use another route to MDMA), and the existance of pseudoephedrine (which is what the methheads will use).
Sometimes I really hope for a tight ban on both of the, so that we could get some really interesting chemistry going... ::) ;)
PS: If you stay here for a while, you'll be amazed how unimportant stuff from the Hive I'll remember for years... I don't know how I do it, but I somehow remember almost all the discussions I have read here the last 1-2 years, half of the ones 2-3 years old, and so on... It is in one way a good thing, but I wish I could trade some of this memory for some short-term memory instead. I always misplace my cellphone, forget to call places and names of people. As late as today I forgot I was supposed to go to school...
I remember that a important side reaction with the mesylate / tosylate is elimination (it's discussed in a french article of you - Rhodium, that was translated by Hypo [if my memory serves me right]). That's why I think it's better to work with the ketone ...
pHarmacist, if you are looking for procedures to mesylate or tosylate alcohols, check out Post 336537 (https://www.thevespiary.org/talk/index.php?topic=6392.msg33653700#msg33653700)
(Cyrax: "Tosylate and friends", Chemistry Discourse)