L-Ephedrine synthesis from L-phenylacetylcarbinol (L-PAC)

[OrgUnikum]

l-PAC threads are always instantly overrun by bullshitters, so I say good-bye.

You got the most important information: Acetaldehyde or Pyruvate, a suited yeast and ph <5.

Nobody asked the big and obvious question: How can I find out if a strain of yeast is good or not?
And as nobody asked, there will be no answer but the mention that rather easy methods exist.
Happy searching don't PM me.

bye

 

[handle]

How can I find out if a strain of yeast is good or not?

 

[handle]

Saccharomyces cerevisiae (Baker’s Yeast)

 

[bilibili]

L-PAC and solvent, add methylamine gas into the mixture, no reaction after 10 hours at room temperature. Does the reaction require heating?

 

[bilibili]

The amount of methylamine gas is too small and has not come into contact with the PAC. Ignore this issue.

 

[rampage]

hey bro can you share your method of producing the l-pac, i have what i believe should be 10mls of pac in solvent but have not yet distilled to remove the solvent, so am not yet sure if i have anything.

 

[bilibili]

Using modified engineered bacteria, much better than yeast.

 

[rampage]

okay is that like e,coli

 

[bilibili]

Yes

 

[bilibili]

Having received the product, now preparing to test whether the structure is racemic.

 

[bilibili]

The resulting of L-Ephedrine Hydrochloride has a purity> 98%, matching exactly that of the L-PAC, no racemization occurred.
The entire synthetic process has been successful.

 

[rampage]

excellent job mate, whats the chances of getting you to post your procedure for the production of l-pac using e,coli and then to ephedrine??

 

[bilibili]

If you're interested, just PM.

 

[MadRick]

Please post your procedure bilibili!

 

[bilibili]

The product is racemic after reduction with NaBH4, need to use catalyst/H2.