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Ephedrine Hydrochloride Recrystallization

Ephedrine Hydrochloride Synthesis

Methcathinone HCl Synthesis From Propiophenone

Mephedrone synthesis

α-PVP/MDPV synthesis from 2-Bromovalerophenone

Mephedrone hydrobromide synthesis

2-Bromo-4'-methylpropiophenone synthesis from 4'-methylpropiophenone

Ephedrine Hydrochloride Synthesis

Novator
Feb 26, 2024
Tags

ephedrine hydrochloride

Reactions: diegoarmando, hoboking, InnocentBystander23 and 19 others

So easy and cheap

dont know why you use DCM to extract the ephedrine freebase the toulene or xylene polarity is better for extracting freebases and dont form side product when adding NaOH, do you know what stereoisomers of ephedrine are produced is it reacemic ?

By employing this method all four diastereoisomers will be formed in variable concentration, one chiral carbon atom (the one with the nitrogen) will have its chirality dictated by the ephedrone. The oxo(keto) reduction yields racemic alcohols with borohydride but carrot slices can do the trick and finish with a single pair of enantiomers, the tedious workup would become the problem in this case.

Another awesome video thanks guys I've been waiting for this one

A
auc
Feb 27, 2024
5.00 star(s)

Excelente

HerrHaber said:
By employing this method all four diastereoisomers will be formed in variable concentration, one chiral carbon atom (the one with the nitrogen) will have its chirality dictated by the ephedrone. The oxo(keto) reduction yields racemic alcohols with borohydride but carrot slices can do the trick and finish with a single pair of enantiomers, the tedious workup would become the problem in this case.

I think that the best way would be make ephedrine reduction to get racemic meth and make the enantiomer resolution.

btcboss2022 said:
I think that the best way would be make ephedrine reduction to get racemic meth and make the enantiomer resolution.

In that case not many advantages than P2P route.
Another option could be make the enantiomer resolution to the ephedrone but not sure how it will works and you would keep the levo isomer to later process the levo ephedrine to reduce it and obtain dextro meth.

good

btcboss2022 said:
我认为还原最好的方法就是麻黄碱外消旋冰毒并进行对映

btcboss2022 said:
我认为最好的方法是将麻黄碱还原以获得外消旋冰毒并进行对映体拆分。

怎么拆分，有具体方法吗？

wwcc11 said:
怎么拆分，有具体方法吗？

Use english
怎么拆分，有具体方法吗？
How to split, is there a specific method?

http://bbzzzsvqcrqtki6umym6itiixfhni37ybtt7mkbjyxn2pgllzxf2qgyd.onion/media/d-methamphetamine-hydrochloride-synthesis-via-tartaric-acid.81/

M
Mr.Poland
Feb 28, 2024
4.00 star(s)

avaliable to do it without lab glass ?

Can you upload this video on https://www.bitchute.com and the another one ?
With this addon https://addons.mozilla.org/en-US/firefox/addon/bitchute-download/
i can download it otherwise the download will be everytime after 10sec canceld

thecurious said:
Can you upload this video on https://www.bitchute.com and the another one ?
With this addon https://addons.mozilla.org/en-US/firefox/addon/bitchute-download/
i can download it otherwise the download will be everytime after 10sec canceld

Good luck with that…

btcboss2022 said:
I think that the best way would be make ephedrine reduction to get racemic meth and make the enantiomer resolution.

Resolving ephedrine before reducing it to meth would be so stupid that nobody with the actual skill to resolve it would ever do it in practice. Therefore you are right.

I think the only shortcoming of this video is that it doesn't split the ephedrine because what you get is mixed ephedrine. I think no one in our forum is willing to split ephedrine and share the video. If someone does, he is a great chemist. Or a better way is to reduce it to mixed methamphetamine and then split it

R
Raz
Mar 2, 2024

Junjun888 said:
I think the only shortcoming of this video is that it doesn't split the ephedrine because what you get is mixed ephedrine. I think no one in our forum is willing to split ephedrine and share the video. If someone does, he is a great chemist. Or a better way is to reduce it to mixed methamphetamine and then split it

Here is a video doing what you're talking about separation of the isomers L & Dextro...

bbgate.com

Methamphetamine Isomers Separation by Tartaric Acid

Introduction In this article, a detailed description of d-methamphetamine hydrochloride synthesis via tartaric acid was represented. This isomer separation approach is the easiest and most popular among clandestine chemists. It's reasoned by cheap and affordable d,l-Tartaric acid (CAS 133-37-9)...

bbgate.com

$
$!$
Mar 6, 2024

ph better have 6-5.5 because u get more pure product and then dont need wash with acetone. when is more pure then get nice glass crystal. Not need use ph2 or ph4 is tu much acid then product is much more dirty.
the same u can throw first acid and get ph 6 and then use 3x water.
Whe know when is pure if color water is the same no change color on yellow or orange then we know with what pure liquid we work.

Can this be used in the red p and iodine crystal reduction?

Why would you use methcathinone to synthesize ephedrine? Makes me curious

Can you use sodium hydroxide instead on boro?

loadingST said:
So easy and cheap dont know why you use DCM to extract the ephedrine freebase the toulene or xylene polarity is better for extracting freebases and dont form side product when adding NaOH, do you know what stereoisomers of ephedrine are produced is it reacemic ?

Separation of racemate into enantiomers is a headache and many hours of work. But the fact remains that reducing a mixture of ephedrine isomers with HI in the presence of red P as a catalyst will result in a racemic mixture of methamphetamine isomers that will surpass D-methamphetamine alone in terms of taste and effects. This is just my own opinion about my experience in this matter, because, after all, discussing flavors is a waste of calories.

btcboss2022 said:
In that case not many advantages than P2P route.
Another option could be make the enantiomer resolution to the ephedrone but not sure how it will works and you would keep the levo isomer to later process the levo ephedrine to reduce it and obtain dextro meth.

Yeah btcboss2022 I was reading on some of the original workups, way back when they first started employing synthetic routes to (-)ephedrine, > resolved intermediate prior to reduction to E, then another rxn ( I don’t recall the catalys, they did use one though) to yield (+)PSE
I like The idea of getting the racemate isolated early then carying out rx to desired product. To bad methylamine is asymmetric.. you on to any chiral rxn from ketone? I know Hydrogenlysis shit looks a bit over My head

Akashic said:
Yeah btcboss2022 I was reading on some of the original workups, way back when they first started employing synthetic routes to (-)ephedrine, > resolved intermediate prior to reduction to E, then another rxn ( I don’t recall the catalys, they did use one though) to yield (+)PSE
I like The idea of getting the racemate isolated early then carying out rx to desired product. To bad methylamine is asymmetric.. you on to any chiral rxn from ketone? I know Hydrogenlysis shit looks a bit over My head

you on to any chiral rxn from ketone?
I only know reductive amination with (S)-alpha-Methylbenzylamine.

btcboss2022 said:
you on to any chiral rxn from ketone?
I only know reductive amination with (S)-alpha-Methylbenzylamine.

Pd/c

loadingST said:
Pd/c

Yes at 10%

When you download this video you get the Ephedrine Crystallization video not this video of Ephedrine HCl Synthesis

After the addition of the entire amount of sodium borohydride, the reaction mixture is stirred for 24 hours. Figure 4

VI6uSH3CbU

Great chemist can we skip this 24 hours stirring of reaction mixture by heating again for 40 minutes at 40°c.

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