Metamfetaminsyntes från P2P genom NaBH4-reduktion. Medelstor skala.

[btcboss2022]

Hallå där!

Efter många tester med Methylamine HCL baserat på denna metod kommer jag att dela det bästa sättet som jag hittade för att få Methamphetamine freebase i stor skala:

• 966 gr P2P
• 14 liter metanol
• 1183 gr Metylamin HCL
• 638gr NaOH
• 452 gr Vattenfritt natriumsulfat
• 105 gr NaBH4
• 35 L destillerat vatten
• 7 liter DCM

- Fyll reaktorn med 14 l metanol
- Lös upp metylamin HCL under omrörning
- Sätt reaktortemperaturen vid 0C (inte blandningstemperaturen) och tillsätt NaOH, temperaturen kommer att öka
- När temperaturen kommer tillbaka till 20C tillsätt P2P, temperaturen kommer att öka rör om det under 45min-1 timme
- Tillsätt 252 g vattenfritt natriumsulfat
- När blandningens temperatur når 8C börjar du tillsätta NaBH4 portionsvis, utan att överskrida 20C
- När all NaBH4 har tillsatts låt den blandas under 20C under ca 2 timmar tills blandningen slutar bubbla
- Tillsätt vattnet och fortsätt blanda under 5 minuter
- Tillsätt DCM och blanda under 10 min
- Sluta omröra och låt skikten separeras
- Behåll det undre skiktet och kasta det övre (det är inte lönsamt att extrahera denna vattenhaltiga fas)
- Tillsätt 200 g vattenfritt natriumsulfat till det sparade skiktet och blanda det
- Filtrera det i Buchner-tratten
- Indunsta DCM
- Ren och illaluktande Metamfetamin freebase erhållen

;-)

 

[snowbones]

Is the 35 litres of water added to ensure seperation of the dcm and water cos of the methanol present to stop it all mixing?
and are you using a 100 litre HDPE paint bucket as the reaction vessel?

 

[Chemistry lntern]

Excuse me! Is it necessary to use an ice bath when setting the reaction temperature to 0 degrees (not the temperature of the mixture

 

[Chemistry lntern]

Sir, may I ask if I know if the deep red liquid obtained after evaporating DCM is correct？

 

[Atompower]

Has any one trying this method of btc boss and had success with his write up

 

[William D.]

This looks like a working method, but some reagents and conditions can be changed.

 

[rage565]

Is there a video of this procedure available?

 

[G.Patton]

Have you tried to open Video section?

 

[Grubby]

Is 15g of NaBH4 enough as the reducing agent for 138g of P2P? Or should I add a small amount of reducing agent to avoid some side reactions?

 

[G.Patton]

Hello, yes it's not enough. You have to add at least equimolar amount 38.91g of NaBH4. It's even worth to add a little more, ~1.1 eqviv 42.8g.

 

[Grubby]

Idol, there must be a special reason why you choose to use less reducing agent! For example, to avoid certain side reactions or to favor certain steps? Please Master, please enlighten me on the mystery behind this.

 

[GnarleyBarley]

You don't need that much, 15 g (maybe a tiny bit more) is enough. 1 mol NaBH4 can reduce more than just 1 mol of imine. It can theoretically reduce 4 moles!!!

Don't know why patton says otherwise, but it's not true. and countless of articles, synthesis on forums and so on pretty much proves it

The following is for MDMA but the same molar ratio of NaBH4 applies to methamphetamine synthesis (here 0.47 equivalents is used)

 

[Chemistry lntern]

How does methylamine hydrochloride and methanol produce a 10% methylamine methanol solution

 

[GnarleyBarley]

Methylamine hydrochloride in methanol, add naoh.
You now need to filter the solution (NaCl is precipitated) and dry it with something (sieves, mgso4 etc). Filter it again
or just filter it one time after mgso4

Notice: More products are formed than what is shown in the table below (NaCl) is not shown because I don't care about how many grams of NaCl is produced, it will be filtered of anyway

CH6ClN = Methylamine hydrochloride, CH5N = methylamine, HNaO is NaOH (This table was made automatically in chemdraw, and this is how they do it.

As you can see, 26g of water is produced to make 45g methylamine from 98g of methylamine hydrochloride. Therefor you need something to dry up all the 26g of water (minimum)

I failed this reaction when I didn't dry it enough (because I didn't realize that so much water was actually produced (just added a little bit of mgso4 and thought I was good to go)

Also you don't need to have exactly 10% Methanol solution. Just enough to hold all the methylamine and enough to keep dilute the reaction enough.