Przygotowanie roztworu wolnej zasady metyloaminowej

[real4]

Pl
Dziękuję bardzo za tę darmową wiedzę, proszę o kontakt.
Czy ten roztwór metyloaminy można przekształcić w 60% i czy może on działać dla

Metoda uwodornienia. dzięki za odpowiedź

 

[G.Patton]

Witam, o jaki roztwór pytasz i co to jest metoda uwodornienia? Czy możesz być bardziej precyzyjny?

 

[real4]

Czy chlorowodorek metyloaminy można przekształcić w 60% roztwór wodny i czy ten roztwór może działać w redukcyjnej alkilacji metodą katalitycznego uwodornienia?

 

[real4]

Mam na myśli użycie wodoru zamiast folii aluminiowej

 

[G.Patton]

Stary, nie potrafię czytać w myślach. Uwodornienie CZEGO?
Tak

 

[hopper_GL]

You're a fuckin lifesaver G. Patton!! I have been looking for an in depth procedure for the 40% aqueous solution of methylamine so I can attempt the Mephedrone HCL synthesis. Being in the US, I havent seen mephedrone since I could legally import it. So I have tracked down everything for doing this synth at half scale, (my limiting reagent is the 4-methylpropiophenone), except the 40% solution. With this writeup think I can pull it off. Then I might have to drop the cheddar for a liter of the 4mpp

 

[B APPLE]

Teacher, may I ask if after adding sodium hydroxide to the water and stirring until dissolved, it will no longer be transparent！

 

[CCL4 huffer]

then u didnt disolve it fully

 

[mycelium]

It literally says that you WAIT FOR THE EXOTHERMIC REACTION TO BE DONE which is clear liquid and cooled down

 

[B APPLE]

Teacher! May I ask if there is a diagram for the 40% synthesis method of methylamine water?

 

[B APPLE]

Teacher, may I ask if the second bottle of 600ml water is filled with methylamine gas? If the 600ml of water reaches 1kg, then it is considered complete, right?

 

[G.Patton]

Hello
yes

 

[B APPLE]

If there is no reaction after adding methylamine hydrochloride to the sodium hydroxide solution, do we still need to add 869 grams？

 

[B APPLE]

Do I need to seal when introducing amine gas？

 

[Eddybeaumont]

thank you for this valuable help! That said, I would like you to enlighten me -5. A silicone tubing with vial connector is attached to the reaction vial with methylamine free base. what material should we use to hang this silicone pipe?

 

[NovicechemistEU]

Does this video summarize what is being done?

 

[Chemistry lntern]

Excuse me, teacher! After I introduced methylamine gas, the water became lighter and lighter！

 

[Chemistry lntern]

Teacher, do you mean to heat the flask containing methylamine free base to boiling and let the water flow together to the second flask？

 

[Rabidreject]

Hey, I have a little p2p and was planning on reducing via Al/Hg amalgam.
I am going to make some methylamine HCl and was wondering if I absolutely have to bubble the freebase into water for the amalgam reduction or if I could get away with making a 30% methanol solution (the second method above).

Essentially what is the easiest way of utilising the HCl salt of methylamine in the reductive amination reaction with p2p. Thanks!

 

[CCL4 huffer]

dont think that would intervene mutch but why not just use the methylamine gas directly it saves sum solvent

 

[Arakava]

In this method of synthesis methamphetamine we use 88% ethanol and 40% aqueous methylamine.
So can we make methylamine free base 40% in ethanol and use it?

 

[Arakava]

I tried to dissolve 34g NAOH in 46g ethanol. Are you sure NAOH is soluble in alcohol?
A salt formed and all of it went to the bottom of the beaker. I think NAOH has low solubility in alcohol.
Isn't it better we pour NAOH(S) in a flask and dissolve methylamine hcl in ethanol and add this solution to the NAOH flask and start strring. Reaction produces water. And more water dissolves all NAOH?