Synthese van methamfetamine uit P2P door reductie met NaBH4. Middelgrote schaal.

[btcboss2022]

Hallo,

Na vele tests met Methylamine HCL op basis van deze methode zal ik de beste manier delen die ik heb gevonden om Methamfetamine freebase op grote schaal te verkrijgen:

• 966 gr P2P
• 14 liter Methanol
• 1183 g Methylamine HCL
• 638 g NaOH
• 452 gr Watervrij natriumsulfaat
• 105 gr NaBH4
• 35 L gedestilleerd water
• 7 liter DCM

- Vul de reactor met 14 liter Methanol
- Los al roerend de Methylamine HCL op
- Zet de reactortemp op 0C(niet de temp van het mengsel) en voeg NaOH toe, de temp zal stijgen
- Zodra de temp terug is bij 20C voeg de P2P toe, de temp zal toenemen roer het gedurende 45min-1 uur
- Voeg 252gr watervrij natriumsulfaat toe
- Als de temperatuur van het mengsel op 8C is gekomen, voeg dan portiegewijs NaBH4 toe, maar niet meer dan 20C.
- Zodra alle NaBH4 is toegevoegd laat het mengen onder 20C gedurende ongeveer 2 uur totdat het mengsel stopt met borrelen.
- Voeg het water toe en blijf mengen gedurende 5 minuten
- Voeg de DCM toe en meng gedurende 10 minuten
- Stop met roeren en laat de lagen zich scheiden
- Bewaar de onderste laag en gooi de bovenste weg (niet rendabel om deze waterige fase te extraheren)
- Voeg 200 g watervrij natriumsulfaat toe aan de bewaarde laag en meng het.
- Filtreer het in een Buchner trechter
- Damp de DCM in
- Schone en stinkende Methamfetamine vrije base verkregen

;-)

 

[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？

 

[Chemistry lntern]

The taste is really good! Teacher, may I ask what the next step is for obtaining butter

 

[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.

 

[Chemistry lntern]

What is the next step to obtain butter？