The optical resolution of racemic amphetamine/methamphetamine has been known for years. https://erowid.org/archive/rhodium/chemistry/amphetamine.res... What has surprised me is how infrequently it seems to be carried out, given the materials required for it. This is all you need: - D-Tartaric Acid (You can buy it from import sites in bulk for $30-60/kg) - Lye/Sodrium Hydroxide - Ethanol/Everclear (if you're convertin…
Agreed the process is very simple. The innovation that makes the resolution worth it is (as Derek also mentioned in the blog post) an efficient way to re-racemize the L-meth to DL-meth, which can then be resolved again. With steady state production and pooling this means it can be done using just one batch size (and not ever smaller "brsm" style bathces). If these steps are efficient enough you definitely get much mo…
To ELI5 this, what the commenter is saying is that you can take the "useless" L-Meth, and convert it to racemic, mixed D/L Meth.
Which you can then perform a second resolution step on, to convert/purify further, to the opposite chirality and get D-Meth.
The very interesting thing about this (if I were a clandestine chemist, or someone who wanted to get high at home), is that:
- AIBN is a readily available reagent, it's not difficult to acquire or would put you on any lists. This is in comparison to much of what you need for other synthesis techniques
- You can buy L-Meth legally over the counter. The extraction process would be a bit of a mess (quite literally) but should be doable, some basic recrystallization and/or conversion to freebase.