Sinteza mefedrona (4-MMC) v topilu NMP. V velikem obsegu.

bubuka

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Rad bi izdelal MMC v NMP. Težava je v tem, da nimam pH papirja. Kako problematično je, če se na koncu preveč zakislim? Ali mi lahko poveste, koliko 30-odstotne klorovodikove kisline moram dodati na koncu, če uporabim 100 g 2b4m? Kislim v DCM+voda.
 
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WillD

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Če nimate dovolj izkušenj, morate uporabiti indikatorje, da dosežete največji možni izkoristek. Če to ni mogoče, vam lahko izračunamo minimalno količino kisline, ki jo lahko dodate, da dobite izdelek.
 

TheVacuumGuy

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Če kupujete električno, si naredite uslugo in dodatno zapravite za sondo za steklo. V nasprotnem primeru se bo raztopila (ja, bilo je tako).
 

c01db100d_india_mephedron

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ali lahko nadomestimo
klorovodikova kislina v klorovodikovo 48%
če je to mogoče, kolikšen je izkoristek izdelka in kolikšna je količina, ki jo želimo
 

WillD

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Da, to nadomestilo lahko uporabite. Teža izdelka pod enakimi pogoji bo nekoliko večja.
 

Hanna520

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Zakaj uporabljati benzen in NMP. Namesto tega uporabite etil acetat. Veliko bolj varno. Zamenjajte monometil-aminski aqua za alkoholno osnovo.
Po dodajanju vode. Ločite plasti. Vzemite "oljno" plast in destilirajte EA. Ta korak je debelejši. Osnovno olje hladite 1 uro v zmrzovalniku -19. Nastanejo nereagirani stranski produkti. Raztopino filtrirajte in bazo dajte v AC ter s HCL37 % dodajte pH na 5,5.

Za segrevanje ne uporabljajte plamena. Namesto tega uporabite kopel. Ta nastavitev vam bo dala dobre rezultate. ;))
 
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momogf

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Dober način, kako sem sam naredil 2bromo4metilenopropiofenon
 

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dnBQByvHb8Zkawbjpx

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O tem smo pred nekaj dnevi razpravljali v glavnem klepetu. Splošno priporočilo je bilo, naj se EA za boljši izkoristek destilira pri 55 °C v vakuumu (/pod negativnim tlakom). Ali ste imeli v mislih to ali ste želeli destilirati pri normalnem tlaku pri 77 °C (temperatura vrelišča EA)?

O tem sem prvič prebral in to bom poskusil.

Začel bom temo o povečanju izkoristka 4-MMC in vas povabil, da delite svoje znanje. Zdi se, da o tem veliko veste.
 

WillD

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Da, metoda z etil acetatom je dobra, če imate metilamin alc. soln. Z njo lahko rešimo veliko težav.
 

Germanium

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Ali je mogoče v fazi kristalizacije namesto dodajanja klorovodikove kisline prekuhavati plinski vodikov klorid?
 

dnBQByvHb8Zkawbjpx

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Da, to je dobra alternativa uporabi klorovodikove kisline, če ste želeli reči "zakisanje" namesto "kristalizacija". V fazi kristalizacije se kislina ne dodaja.
 

goku1008

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but in video no Benzene used
 

CARLITOBRO

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can we replace NMP also with ethyl acetate and if yes how much for 100gr of 2b4m
 

HIGGS BOSSON

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Yes, you can use NMP, DCM, ethyl acetate
bbzzzsvqcrqtki6umym6itiixfhni37ybtt7mkbjyxn2pgllzxf2qgyd.onion/en/threads/mephedrone-4-mmc-synthesis-from-haloketone-in-ethyl-acetate-1-10-kg-scale.39/unread
 

baadwd332

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Hey, thanks for sexy video.
I wonder if you know Perrine paper about bupropion synthesis in NMP (Im sure you do, apparently he got an idea to use NMP).
If not, here you go:

Perrine, D. M.; Ross, J. T.; Nervi, S. J.; Zimmerman, R. H. A Short, One-Pot Synthesis of Bupropion (Zyban®, Wellbutrin®). J. Chem. Educ. 2000, 77 (11), 1479– 1480, DOI: 10.1021/ed077p1479


If you carefully read SI you will see that they had to wash out methylamine from organic layer. Had to be couple of times of water washing. In your procedure you don't even wash organic (benzene) layer, thus I wonder if you ever check melting point? Seems it might be mix of 4mmc and methylamine hydrochloride.
 
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