Then 40g of NaCI was added to this decolorized solution and was kept at 650Co for
30minutes to change the acetates of Harmine and harmaline into their hydrochloride
Pyridine insoluble Harmaline was collected and dissolved in EtOH and recrystallized. Both bases were further purified by recrystallization of their hydrochlorides. Their Rf values, melting points, UV and IR values were determined.
Harman alkaloids (Harmine and Harmaline) were isolated by complexation with
mercuric ions (Hg++) with high selectivity and fairly good yields, 0.2 % Harmine
and 1.5 % Harmaline per total weight of Peganum harmala seeds (reported
values 0.8 % and 1.7 %), respectively. Purity of the complexes was checked by
TLC, both gave a single spot.
Crystalito said:Hmmmm well then, the addition of H2O2 will make short work of it either in solution -if the dehydration can happen while in solution- or when it starts drying. Eitherway, we will see how it behaves when dried, so far the alkaloids arent exactly protected against oxidation :d . Ah, how nice it would be if we could have some spectral analysis on Harmala red or at the products of this experiment. From what i see though ,that can prove from difficult to impossible.
I wanted also to comment on the first link geeg30, gives us and please be free to comment on my commentary:
First of all i think i have spotted a mistake :
Second page,near the end and continuing over the the third
Then 40g of NaCI was added to this decolorized solution and was kept at 650Co for
30minutes to change the acetates of Harmine and harmaline into their hydrochloride
This was done in an acetic 5% solution but...exposing it to 650 degrees celcius (1202 F)?!?! There could be a typo there, the solution would evaporate or worse! I think they made a typo there and meant 65 C (149 F). Whats your opinion on that?
Another comment is on text on third page:
Pyridine insoluble Harmaline was collected and dissolved in EtOH and recrystallized. Both bases were further purified by recrystallization of their hydrochlorides. Their Rf values, melting points, UV and IR values were determined.
Wouldnt dissolving in ethanol (freebase here) turn it to anhydride as 69ron mentioned and make it lent itself to oxidation ? Hmmm I would expect them to see more "harmala red" forming and propably detect "something else" in their apparatus although they didnt seem to do so. I wonder if harmala red indeed forms from peganum harmala but it forms from something else than harmine or harmaline.
Also note that their yield were quite low!
Also got to remember that there are over twenty different alkaloids in P Harmala seeds - maybe the less meticulous methods are extracting some of the other alkaloids. But I also thought the yield was low.Harman alkaloids (Harmine and Harmaline) were isolated by complexation with
mercuric ions (Hg++) with high selectivity and fairly good yields, 0.2 % Harmine
and 1.5 % Harmaline per total weight of Peganum harmala seeds (reported
values 0.8 % and 1.7 %), respectively. Purity of the complexes was checked by
TLC, both gave a single spot.
Hmmm, maybe their purity accounts for it given that after a point there are diminishing gains.All in all they found the seeds to contain 1.7% alkaloids? Propably people at forums find they contain more due to less meticulous methods? For example noone would sweat if their alkaloids are 89% clean .Another thought is, if indeed harmala red is formed by harmine and harmaline ,did they loose yield from there? And could carbon selectively pick what is harmala red but not other beta-carbolines?
Hmmm, all in all very interesting!
Whiterasta mentions a red film/oil on the filter, so the reaction forming the red did indeed take place.Crystalito said:Well ,the whole harmala red issue seems -it might not be, but it seems- easy to crack:
If one wants to see if its an oxidation product ,harmine/harmaline mixture or even better seperately can be added to hydrogen peroxide, let the reaction take place and see if it becomes red.
Same with addition of alcohol:If there is red to be seen it will be seen.I think i spoke with a member that did the alcohol experiment and found it became red.On the other hand,was it whiterasta that extracted with alcohol and had no such problems? Look here,seems it worked like a charm!