4 compund: Ephedrine/Pseudephedrine isomers resolution to form crystals

[magdagessler]

Hello everyone,
i succesully syntethized ephedrine/pseudoephedrine isomers by amination of bromine ketones and then by reduction by NaBH4. however there it stops because I have problems with form a crystal. Of course I have white powder with probably 4 possible isomers and therefore I cannot form fine white crystals. I read a lot about tartaric method but is it the only way to seprate it and most convinience??
Some of you mentioned that this route isn't best to get good product but I have such raw materials

 

[Junjun888]

Have you successfully isolated ephedrine using tartaric acid?

 

[magdagessler]

Right now I'm focused on different topic but nov/dec i want to back to this problem.
If I solve it, I will give you sign but. Even If not of course I will tell you where I stuck

 

[Johnny_Hammersticks]

What topic are you focused on then?