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uncle_buck
(Stranger) 09-23-02 21:14 No 359793 |
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Is this ephedrine synth really possible???? | Bookmark | |||||
"Ephedrine from Benzaldehyde and D-L Alanine, Heat to yield CO2 + ephedrine." Does this really work? Will pure l-isomer alanine work as well? Is it just the benzaldehyde and alanine in equimolar ratio or some other ratio? No solvent mentioned, so none needed, I suppose? Thanks Hive gurus! ub |
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Bandil (Hive Bee) 09-23-02 23:38 No 359843 |
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I think you are mistaking | Bookmark | |||||
Hi! I think you are confusing PPA and eph. By using the alanine + BA one will get PPA and not eph. To get eph you would have to use N-methyl-alanine, which is not so easy to come by as alanine. As for solvent i belive you can find the answer by UTFSE. Regards Bandil |
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uncle_buck (Stranger) 09-24-02 15:22 No 360089 |
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Thanks for the clarification | Bookmark | |||||
PPA, gotcha. I will FS for the solvent info U'ing TE. |
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Aurelius (Hive Bee) 09-27-02 21:52 No 361506 |
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solvent | Bookmark | |||||
use toluene or xylene as the solvent (although aurelius believes one may not be absolutely necessary- may even raise yeild) if picking between the two above, choose xylene, it has a higher boiling point (all three isomers are higher than toluene) and this allows for a better high boiling solvent for the decarboxylation that occurs at elevated temps. |
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