1-Fenyl-2-propanon (P2P) Leuckart-aminering till amfetamin och metamfetamin. Liten skala.

Selassi

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Swim har fått en fråga om en annan variant av denna metod:

Efter det första steget (kokning med myrsyra och formamid) kokar de nu igen den organiska fasen med vatten och NaOH istället för återflödet med HCl.

Kan någon förklara för mig mätvärdena för detta annorlunda andra steg för mig? Swim har aldrig gjort det på det här sättet men det verkar spara mycket tid i motsats till oldschool-metoden med återflödande HCl.

Vilken styrka av kaustik/vatten och hur mycket tillförs reaktorn per liter produkt?
Hur länge ska man koka denna reaktionsblandning vid vilken temp?
 

waltjr5858

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You can do hydrolysis with a base or an acid...
 

G.Patton

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Använder du återflödeskondensor och dragskåp?
 

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?
 

TheNut22

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Jag gjorde mina starkare väteperoxider från 12% H2O2. Jag avdunstade bara försiktigt vatten från det.
Jag bad om beräkningar från AI-robotassistent i kemi. Det är bra på beräkningar, men förvänta dig inte att få rätt svar
från halogeneringar eller liknande ...
 
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loadingST

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Jag har fortfarande inte provat reaktionen men med bra hydrolisis med KOH och sedan med HCL borde det ge högt utbyte, och jag är rädd att arbeta med H2O2 för att inte bilda några explosiva peroxider och vid destilation för att inte explodera
 

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?
 

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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