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You only need to carry out chiral separation and leave D-FB, acidify and recrystallize it, and continue to cool down slowly, without shaking, until the temperature is below zero.

Can you share the process of cold cooking? Cold cooking means that you can produce some products conveniently and in large quantities.

My D is always mixed with some racemization. I think when I use tartaric acid, I don’t pay enough attention to it, but I also extract L. In the end, the total amount of D is always 10~15%. Racemic, but the good news is that when recrystallizing it is always mostly D, and racemic is all around:D

You just need to pay attention to nitrogen, phosphorus and potassium, and give adequate nutrients at each stage. Contains Calcium Magnesium

I would like to know what kind of oil you are talking about A-oil and B-oil.

Have you tried using the phosphoric acid method to convert P2P successfully? Conversion rate %

I hope that one day you can get the answer and I can improve my knowledge

Hello, have you ever used the NaBH4 reductive amination procedure? I would like to ask you some questions.

I hope to know as soon as possible after the release, and understand what method can be simple and get the best conversion rate

These patterns are beyond the scope of my ability and I can’t understand them at all. Hahaha, I can only wait for a simpler and clearer explanation.

I would like to ask, 5449-12-7 is no longer available for purchase. Is there any alternative that can be substituted? And can it be successfully reduced with NaBH4 with good yield?

Have you obtained the new BMK sodium salt? Do you feel it is different from 5449?

What is the CAS of the new BMK after 5449? I also want to get some and do some experiments. 5449 is no longer available.

There is not enough sodium hydroxide. When producing methylamine gas, the methanol-methylamine solution should be kept at a low temperature to ensure that the methanol absorbs the methylamine gas. Moisture will be produced in the front section. It is recommended to remove the moisture. The...

Is there any new substance that can replace 5449 (old version of sodium salt)? Can you tell me the CAS or name of the new sodium salt? I also want to get some and try to use the new version of sodium salt to make P2P

In this method of BOSS, apart from the water problem, is there anything else that will affect the yield? Why is the yield of methyl free base remaining after evaporating DCM only 50%? Is there anything I should pay attention to that I haven’t noticed? Please help me~~ @G.Patton

Which BMK do you have? How many reactors do you have that are large enough?

Hello, I would like to ask about what you said about using glycidyl salt instead of sodium salt. How can you tell the difference between these two salts? Is CAS the same?

If you are using L tartaric acid (87-69-4), the solid after mixing is L- and L-tartaric acid. Put the whole bowl in the refrigerator for one day, take it out, add a little methanol and stir, use a filter funnel to separate the solid from the methanol. D-methyl free base can be obtained by adding...

I'm preparing, but my equipment is very rudimentary. Maybe the videos are just fragments. Have you successfully produced D-METH?