1-Fenil-2-propanonă (P2P) Aminare Leuckart la amfetamină și metamfetamină. Scala Smale.

Selassi

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Swim a primit o întrebare referitoare la o variantă diferită a acestei metode:

După primul pas (fierbere cu formic și formamid), acum fierb din nou faza organică cu apă și NaOH în loc de reflux cu HCl.

Poate cineva să-mi explice metrica acestui al doilea pas diferit? Swim nu a procedat niciodată în acest fel, dar pare să economisească mult timp în comparație cu metoda de școală veche cu HCl la reflux.

Ce concentrație de caustică/apă și câtă cantitate este introdusă în reactor pe L de produs?
Cât timp ar trebui să fierbeți acest amestec de reacție și la ce temperatură?
 

Curiousonion

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De ce un randament atât de scăzut pentru acest lucru, are cineva o metodă cu randament mai mare pentru metamfetamină?
 

Saul

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că nu este corect greșit info că tipul cu teza face greșeli mari

carbonatul de amoniu nu este niciodată utilizat direct cu p2p.
În primul rând, se fabrică formatul de amoniu.
Formatul de amoniu se obține ușor prin carbonat de amoniu și acid formic. Se titrează
la un pH frumos de 7 și se elimină apa.
Numai atunci poate fi utilizat cu p2p
 

waltjr5858

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Yes ammonium carbonate can completely be used in this reaction directly it's actually a very popular method in many countries and makes ammonium formate in situ.... if you're not 100% sure what you're saying on here don't
 

G.Patton

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Utilizați condensator de reflux și hotă de fum?
 

waltjr5858

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In a write up that most people are reading to do this leuckart with formamide and p2p specifically... what is the purpose of a 15 min reflux with 30% h2O2 with the reaction mixture after you have already done the first reflux with formamide and p2p. Does it clean up or oxidize something? I mean this is prior to the hydrolysis. I just can't think of what it would do. I mean most people do it without it but it was obviously added for a reason in a actual professional write-up.
 
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G.Patton

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Sorry, but I don't clearly understand about what "15 mix reflux" are you talking about? Can you be more precise. Refer to a step number.
 

waltjr5858

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It's not on these instructions. When making amphetamine after the first 24 hour reflux on a different set of instructions they would reflux for 15 minutes with 30% hydrogen peroxide and then go on with hydrolysis. What was the point of the peroxide?
 

G.Patton

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I have no Idea about what "different set of instructions" are you talking and hence can't answer your question.
 

waltjr5858

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Ok... but in general then what would happen to the resulting solution if spun up with 30% peroxide?
 

William Dampier

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Utilizarea unei cantități suplimentare de apă în reacția Leuckart poate crește randamentul. Cine a făcut-o, poate scrie despre asta aici.
 

TheNut22

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Da. În Leuckart, trebuie să vă asigurați că nu există deloc apă.
 

southcost

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But we have a 12% water at least in our formic acid, isn't it?
 

TheNut22

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Am fabricat peroxizii mei de hidrogen mai puternici din H2O2 12%. Am evaporat cu grijă apa din acesta.
Am cerut calcule de la asistentul robot AI în chimie. Este bun la calcule, dar nu vă așteptați să primiți răspunsuri corecte
de la halogenări sau altele asemenea ...
 
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loadingST

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Încă nu am încercat reacția, dar cu o bună hidroliză cu KOH și apoi cu HCL, ar trebui să se obțină un randament ridicat și mi-e teamă să lucrez cu H2O2 pentru a nu forma peroxizi explozivi și la destilare pentru a nu exploda
 

YenaneY

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This questions are mainly regarding the actual chemistry behind the synthesis...
Why does one for the formation of the amine from the intermediate need H2O2 and HCl in the synthesis of amphetamine but only HCl in the synthesis of methamphetamine?
 

waltjr5858

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I saw the same thing and nobody has an answer for it but it was done by actual professional chemist.... not clandestine hackers so id say its there for a reason but it will work without it. Probably to kill off so.e kind of side product or something.
 

YenaneY

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I think it really is because the hydrogen peroxide helps promote the reaction, but the reaction of deformylation is generally easier on tertiary amines compared with secondary ones, which is why it happens more readily if N-methylformamide is used for methamphetamine.
 

Pinkbay

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sir, In step 3, is heating required?
 

rampage

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can you replace n-methylformamide with dimethylformamide?
 
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