Аминиране на 1-фенил-2-пропанон (P2P) по Левкарт до амфетамин и метамфетамин. Мащабът е малък.

Selassi

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Плувайте получих въпрос относно различен вариант на този метод:

След първата стъпка (кипене с мравчена киселина и формамид) сега отново кипват органичната фаза с вода и NaOH вместо рефлукс с HCl.

Може ли някой да ми обясни метриката на тази различна втора стъпка? Swim никога не го е правил по този начин, но изглежда, че спестява много време за разлика от стария метод с рефлукс на HCl.

Каква сила на каустик/вода и колко се вкарва в реактора за 1 л продукт?
Колко време трябва да се вари тази реакционна смес при каква температура?
 

Curiousonion

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Защо е толкова нисък добивът за това, има ли някой метод с по-висок добив за метамфетамин?
 

Saul

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че не е правилно грешно информация че човекът, който пише дипломна работа, прави големи грешки

Амониевият карбонат никога не се използва директно с p2p.
Първо се прави амониев формат.
Амониевият формат се получава лесно чрез амониев карбонат и мравчена киселина. Титрат
до хубаво рН 7 и отстранете водата.
Едва след това може да се използва с 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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Използвате ли рефлуксен кондензатор и аспиратор?
 

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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Използването на допълнително количество вода в реакцията на Локкарт може да увеличи добива. Който го е направил, може да напише за това тук.
 

TheNut22

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Да. в Льокарт трябва да се уверите, че изобщо няма вода.
 

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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Направих си по-силни водородни пероксиди от 12% H2O2. Просто внимателно изпарявах водата от него.
Поисках изчисления от AI-робот-асистент по химия. Той е добър в изчисленията, но не очаквайте да получите правилни отговори
от халогениране или други подобни...
 
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loadingST

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Все още не съм изпробвал реакцията, но при добра хидролиза с KOH и след това с HCL тя би трябвало да даде висок добив, а аз се страхувам да работя с h2o2, за да не се образуват експлозивни пероксиди и при дестилация да не се взривят
 

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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