Синтез мефедрона (4-MMC) в растворителе NMP. Крупномасштабный.

[dark_side_of_chemistry]

В синтезе 2бром-3-хлорпиофенона используется тот же самый ?

 

[RichKuklinski]

it is same

 

[Rocco666]

N

 

[Rocco666]

No

 

[William D.]

да

 

[whitelabel]

@William D. Is the 4mmc light sensitive? Would it lose potency if dried in the sun?

 

[Serega]

Я получаю чистейший продукт в DCM, но главное - не давать раствору кипеть, поддерживать температуру не выше 36C (4-ММЦ получается безупречно чистым и белоснежным). Еще один отличный вариант - дихлорэтан. Также хороший результат получается при использовании NMP и толуола вместе (соотношение 3:2).

 

[crisu1542]

What about the DMF ? Do I have to keep the temperature to 36 degrees Celsius here too ? As far as I know the boiling point of dmf is over 130 degrees.

 

[malignoalfa]

О видеоролике можно сказать следующее:

1) Какая механическая мешалка используется? Верхние механические мешалки часто выглядят как металлический стержень, а не как PTFE.

2) Как происходит опорожнение системы? Через какую трубку RBF?
Вижу, что в системе есть отрицательное давление, и он использует его для подачи в RBF жидкостей с реактивами через шланг.

Спасибо!

 

[G.Patton]

Здравствуйте, это не так важно. Я бы рекомендовал вам использовать PTFE, если это возможно.
Используйте вакуумный насос и силиконовый шланг. В чем проблема и что вам непонятно?

 

[QAZ123123]

A hose should be connected to the top of the reflux condenser, and the hose should be connected to the vacuum pump.This is where the vacuum comes from.

 

[mocnykutas]

Очень хороший синтез.
Мне нравится работать таким образом, быстро и легко.

 

[QAZ123123]

You are awesome，Can I ask you a question?

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

What is the actual amount of reagent used?
4-Methylpropiophenone
Hydrobromic acid 48%
Hydrogen peroxide 37%
Because the dosage is different in each article and video, I don't understand how much reagent should I really use

 

[Heineken]

мы сделали новый 4mmc спасибо bb форум форма помощь

 

[QAZ123123]

The ratio in the video is:
4-Methylpropiophenone (250g)
Hydrobromic acid 48% (191ml/285g)
Hydrogen peroxide 37% (103ml/116g)
The proportions and dosages of these three agents are different，Which one should I choose?
The reagent amounts in one video and two articles are different. Which one should I choose?

 

[wikimiki]

What if I gonna replace NMP with DMF? Somebody tried? What proportion of DMF should be used if in use instead DMF?

Somebody have the stirring timings and than other timings for those synthesis description? It looks very interesting, I will be appreciate.

 

[William D.]

DMF can be used like DMSO, but yield and some other conditions may differ.

 

[lemon]

DMSO+Toluene = Yield

 

[wikimiki]

William thanks a lot but could you tell me how much differ your recipe if I put DCM and what need to be changed if I put as someone said below DMSO and Toulene? I will be appreciate. With highest respect for the recepture you have posted I cannot get how in large scale production the 40-50% of yield can satisfy you?

Best regards

 

[William D.]

For the test, you must mix BK4, dcm and methylamine as usual. You can add the amount of DMSO until the mixture becomes homogeneous. In this form, the reaction will be faster than usual. You control the reaction for the first time in temperature (when the mixture begins to cool, the reaction is finished, even without additional heating). After you add pure cold water and separate the lower layer and rinse again. Further steps are the same as you used (acidification with acetone or into the water layer)

 

[crisu1542]

1. when swapping NMP for DMF, are the temperatures and pH different ? Solvents have different boiling points and I don't know if this is relevant.
2.Finally, what should be the temperature after adding methylamine ? Once it finds 36, once it finds 40.... Need exact information.
3. is it necessary to heat externally or to cool the solution after adding methylamine ?
4. when acidifying use EA or not ? Once I read that no, once that EA instead of acetone.
5. does the free base if it does not exceed 36 degrees Celsius does not require further cleaning ?

Thanks to all experienced in advance .

 

[NieDoswiadczony]

40% roztwór wodny aminy metylowej (CAS 74-89-5can you replace it with something?

 

[As88]

2. n-Methyl-2-pyrrolidone 20 L is poured into the reactor. Top stirrer is turned on and the reaction mixture is heated up to 40 °С - What are you using to heat the mixture to 40 degrees at the above point?

 

[G.Patton]

Temperature control jacket for the batch chemical reactor.
hi

 

[QAZ123123]

Mephedrone synthesis (4-MMC) in NMP solvent. Large scale. The method and materials​

Mephedrone hydrobromide synthesis no the same​

 

[QAZ123123]

Benzene - 20 L; CAS:?
Acetone - 30 L; CAS:?
Hydrochloric acid con. aq. solution (HCl 36%) ~ 1.5 L; CAS:?
Distilled water - 20 L; CAS:?
Magnesium sulphate (MgSO4); CAS:?

What is their CAS number?I'm worried I bought the wrong one

 

[handle]

You can find them here:

PubChem

PubChem is the world's largest collection of freely accessible chemical information. Search chemicals by name, molecular formula, structure, and other identifiers. Find chemical and physical properties, biological activities, safety and toxicity information, patents, literature citations and more.

pubchem.ncbi.nlm.nih.gov

 

[JASPAL]

Can do with Flasks Erlenmeyer 5L this synthesis ?