Ma synthèse du 3-CMC

[mithyl2]

C'est génial.

Pourquoi pensez-vous que le congélateur a donné des résultats étranges lors de la cristallisation ?

À quel point pensez-vous que cette méthode peut être mise à l'échelle ?

 

[Jesse_Pinkman_]

A cause de l'eau, quand elle gèle, d'où devraient venir les cristaux ?
Le réfrigérateur normal fonctionne peut-être mais j'ai mes aliments à l'intérieur et je ne veux pas le nettoyer à chaque fois.
J'ai vraiment essayé beaucoup de méthodes pour arriver au produit final et j'ai aussi gaspillé beaucoup de solvants et de 2b3c, mais la méthode que j'ai décrite a mieux fonctionné pour moi que les autres essais.
J'ai failli être désorienté par toutes ces méthodes différentes, tous ces petits bols avec des mélanges différents se trouvaient tout autour, j'ai toujours regardé lequel se développait bien et lequel ne se développait pas.
Par exemple, quand on met de l'ipa glacée dans l'eau/poudre de cristallisation, on obtient instantanément des cristaux blancs mais ils ne sont pas clairs et juste un peu, donc il faut cristalliser à nouveau et le reste doit s'évaporer, regardez la dernière photo.
Les 3 autres photos montrent ce qui arrive au rm dans mon congélateur, il devient une masse solide qui fond à température ambiante, mais pas de cristaux.

 

[HerrHaber]

There's also a method for 4MMC recrystallization which employs also NaCl (table salt) in most probably a larger amount of water along the product powder and IPA with also different ratios that you must check. Salty water has a much lower freezing point therefore letting the other component crystalize first since sodium salt is perhaps more water attached but the temperature must NOT reach -18*C or any lower at all costs since salt will also start crystalizing and the more it stays the more salt in the stuff. Hope it helped, I may seek it out for you if you don't find it, cheers!

 

[NeoTolls]

How much NaCI u use ?

 

[lheartamines]

Soyez prudent lorsque vous utilisez un appareil de ph numérique et du DCM, si vous le laissez dans le réfrigérateur pendant le contrôle, il fera fondre l'appareil.

 

[Jesse_Pinkman_]

Oui, j'ai eu cela avec un thermomètre

 

[TheVacuumGuy]

I've had this too. Solved by getting an expensive glass probe

 

[misteroil]

Hello guys, maybe someone could help me with situation..?
Ratio of chemicals 1:2br3cl, 3: DCM, 2:MA. stiring for 3hours in 37c. All the time reaction went well, in the end yellow/amber collor of base.
But this time i have very low temp in lab, and i pour all MA in 15mins. All substance temp raised just too 27 degree. Then I put rm to warm bath and raised temp to 35. After 2 hours stiring all was going well. But in next hour all rm turned PURPLE. Acidifying in dem.watter and get purple watter layer. Now i see that my crystals will be purple. How could i wash it? becouse i think that there was much not reacted chems, but wich, i dont know.

 

[JosephBratan]

Hey $!$

 

[TheVacuumGuy]

Hey $!$

 

[pamrz]

Hi Guys,
Im trying 3cmc and I have questions about acidification. I'm working on organic layer - but nothing forms. Made few attempts, some was good most of them not, I cannot realize where is the problem.

1) on which temperature shoud be freebase acidified? Room temperature or is should be cold before acidification?
2) It's better acidifi before or after adding cold acetone ? Is aceton necessary on DCM?
3) I'm on PH 6 and I have very dark liquid, after 12hours in freezer nothing happen (but it must be there, when PH paper dry, there are white crystal layer)
4) Is way add destilled watter to liquid and separe water and let i crystalize?
5) can be separated acidified/ DCM/Acetone/ liquid reuse somehow?
Thank you

 

[Jesse_Pinkman_]

I think, you did not read or understand the process...after acidificaction, you dispose the organic layer, the water layer contains the product and you need to evaporate the water

 

[Jesse_Pinkman_]

Acetone is not necessary, for 4-mmc it is. So, read my recipe, try to understand, what happens there...acidificaction should be at low temperature, dest water from freezer, can also use dest water ice cubes to cool down the rm while acidificaction. Hcl drops every 2-3 seconds 1 drop

 

[pamrz]

Thats the point. I used way that I know from 4mmc.
But product will dispose to water AFTER accidification isnt it?

 

[Jesse_Pinkman_]

Yes, chloro switches to water when ph 6 , organic layer is not necessary then

 

[pamrz]

And about ratio for preparation:
100g 2b3cl / 300ml DCM / 200ml methylamine 3hrs on 38degrees - nice orange colour of bottom layer.

 

[Pinkbay]

Hello friends.
I put it in the refrigerator for 12 hours after acidification and got some salt with different shapes, but when filtering, the salt disappeared and turned into liquid. Does anyone know the reason?

 

[Jesse_Pinkman_]

Read the recipe...no refrigerator, evaporate the water layer

 

[SunDay]

Hello partners..
Im out of stock 2br3cl, but have 2br4m... On mephedrone I was working with toluen in the old days, droping flour..etc..
Now I will work with DCM and watter layer, now reading what best for meph. So in couple post above Jesse mentioned that in mephedrone we need acetone in step by acidification. I want to ask why, and when. Thats the evaporation of watter layer would be faster? becouse acetone mixes homologue with watter... Or we dont need watter at all?

 

[dnBQByvHb8Zkawbjpx]

Hello there,
After amination in DCM you discard the water layer, repeatedly flush the organic layer with water to remove excess methylamine and you always keep the 4mmc free base in DCM. Acetone is then added 1/ to dilute the free base in order to provide better thermal stability so it does not heat too fast as HCl is added, and 2/ to wash away DCM and any impurities soluble in acetone from the precipitate. Acetone is used since it does not dissolve 4mmc.HCl and dries fast without leaving residue, and it's cheap.