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That's right, in order for all of the 2-bromovalerophenone to be guaranteed to react, a 2nd excess of pyrrolidine is taken, and in some cases a 3rd excess.

Hello Are you going the amph-->meth-->D-meth route? What do you get in the end? Please write more details about the process.

The video shows the method of synthesis that the chemist chose. You can make your own video about how you obtained 100 kg of methcathinone. Show it to us so that we can evaluate your method.

Peristaltic pump

Methcathinone is a precursor to ephedrine. This is generating a certain amount of interest in it. Methcathinone is well distributed in African countries, and perhaps Africans could benefit from this synthesis. We are happy to help if anyone has any questions about the synthesis. The syntheses of...

Watch the video carefully. You don't understand the process well enough. What is a red-green base? Why do you need more DCM? When acidified, methcathinone dissolves immediately in water. Byproducts that affect color are quite common in synthesis. That doesn't make the synthesis a failure. It can...

btcboss2022 How's your synthesis coming along?

If bromination is involved, the following solvents are used Glacial acetic acid, dichloromethane, benzene. If your question concerns the amination reaction, the following substances are used Toluene, dichloromethane, benzene. If you notice, when performing bromination in dichloromethane and...

Propiophenone->2-Bromopropiophenone->Ephedrone->Ephedrine->dl-Meth->d-Meth

Many people promote their synthesis methods in PD and offer paid services. They don't create their own threads, but post in other people's threads. In difficult situations with syntheses, you can contact forum experts in private messages for free. And we will try to help. I sent you a message...

Berlin777 It's a wet product. It may still need to be cleaned. Just an intermediate weighing.

The proper crystal. Congratulations.

Go PM

The gradual cooling method works the same way as all the others. The solubility of 4mmc at a lower temperature drops and the crystal begins to grow. The slower the temperature changes, the larger the crystal grows. One disadvantage is that even after crystallization is complete, some 4mmc...

You can do the same thing here

Solvents do not have a decisive influence on the quality of the final product. Synthesis and purification methods are adjusted to the selected conditions.

In my list for synthesizing 4mmc, ethyl acetate is at the bottom of the list List of solvents: Toluene DCM Benzene O-xylene Ethyl acetate

This is to check if the 4mmc remains in the DCM.

Good job! Much better than I had the first time around:) Yeah, it happens, some ridiculousness spoils the synthesis. What you've over-acidified is not critical. But you did break the synthesis protocol a little bit. Of course, it could have been fixed. But the jar broke.... I'm sure it'll work...

I suggest we go to private messages and discuss the details with synthesis.