Síntese de alfa-PVP (escala de 1-10kg). Tutorial completo em vídeo.

[Ukspice]

@William Dampier

Preciso de ajuda com as medições

Em vez de usar :Valerofenona
Vou comprar o líquido: 2-Bromovalerofenona

Se eu quiser usar 1 litro

2-Bromovalerofenona

Qual é a quantidade de reagentes que vou precisar por litro?


-Ácido hidrobromico (HBr) 48%;?

-Peróxido de hidrogénio (H2O2) 35%;?

-Pirrolidina (CAS 123-75-1);????

-Acetato de etilo;???

-Carbonato de sódio (Na2CO3) 20% solução aq;???

-Éter dietílico (Et2O) ????

-EtOH 50 ???

-Ácido dibenzoil-D-tartárico ???

-Diclorometano (CH2Cl2) 830 mL;

-Hexano ????

Ácido clorídrico conc. 35% (HCl);...

AJUDARIA IMENSO SE ME CONSEGUISSEM ARRANJAR MEDIDAS PARA A UTILIZAÇÃO DE 1 LITRO DE 2-BROM. PLEASE?????

Para que eu possa calcular o custo por reação, também é a estimativa de rendimento cerca de 20% de perda
1 litro = 800g de a-pvp?

 

[Marvin "Popcorn" Sutton]

Escrevi-lhe uma PM.

 

[Spikkel93]

Got the same question can u send me also in pm ?
Thanks in advance

 

[GeneralX]

But despite this, I further continued to acidify with 37% hydrochloric acid, having previously added 30 ml of cold acetone. But still nothing formed, so far I put it in the freezer, but I feel that nothing will form. ph always shows around 5. Please help me

Spoiler: photo

 

[G.Patton]

You had to evaporate EA after the reaction. It interferes to form a-PVP HCl crystals.

 

[G.Patton]

Hi, for a what reason do you assume to add water there? Yes, you can heat the solution to 100*C but take into account that it's not okay for free base. It also will be evaporated partly. It's worth to use vacuum distillation!

 

[SpaceRocket]

hello, I have a question, I have all the steps. followed the process and have a nice a-pvp with a result of 80%. I do it on a larger scale between 1 and 0.5 kg bromo, but now I wonder how I can get large, beautiful crystals because if I try to recrystallize in water it grows. back like little needles. You can see on the picturen powder what i have made and the cristals sombody els but he dont want to tel me how he did it if sombody can help me wild be great!!!

 

[G.Patton]

Hi, how do u recrystallize it?

 

[SpaceRocket]

I am loking for method how to cristalize , when i want to cristalize i get nedel cristal like this on the photo

 

[G.Patton]

a-PVP crystallization

 

[RegulierTier]

Can I replace the ethylacetate with toluene or TBME?
I don't have a rotovap so destill under vacuum would be a problem...

 

[SpaceRocket]

I did it with 2 infrared lamps and had to evaporate 16.9 ethiel acetate in plastic containers, which took me 30 hours and i dry my powder also with the lamps that go very fast in view hours your powder is dry

 

[W Alchemy wite]

Which precursors are needed for A-PiHP
Is the process the same?

 

[HIGGS BOSSON]

α-bromo-isohexanophenone, synthesis same a_PVP

 

[Newbee]

What other solvents can be used to replace ethyl acetate in amination stage ? What About DCM?
do procedure time change?
i want eliminate destilation step so preferably solvent that can be easily separated by funnel.

 

[NinjaFlakkaZombie]

Anyone know of a way I can get a free starters kit as this is my first synth and whatever I don't have to sink my entire paycheck into would be greatly appreciated. I have no problem giving up 99% of the yeild as payment

 

[SpaceRocket]

does anyone know how to make MDPHP? Or is it same like A-PVP?

 

[loadingST]

Yes theoreticaly i can help but md group is more hardly handled in FC, so maybe the more easier way is to make the ketone via grignard, and once you got the desired ketone, you can make whatever you want/the same as a-pvp.

 

[keras]

Can I acidify in water solutiom not with acetone? And evaporate water afterwards like with 4mmc?

 

[G.Patton]

You can use less concentrated HCl aq solution.

 

[keras]

I mean crystalize a-pvp in water not in acetone

 

[G.Patton]

You can read a-PVP crystallization topic.

 

[RegulierTier]

Can I use toluene instead of Ethyl acetate so I don't need to use a rotary?

 

[G.Patton]

Hello, you can don't use it with EA as well.

 

[RegulierTier]

What do you mean?
Can I or can I not?

 

[G.Patton]

You are not obligated to use rotovap in any case. Try to carry out synthesis in a small scale at first.

 

[RegulierTier]

Hey, i've made everything like in the Video but after I added Aceton and hcl to the freebase, it seperated into two layers. I've just put it to the freezer without seperating the two layers from each other. Is that okay?

 

[lapgan1]

I always have the same situation as you if I don't evaporate ethyl acetate, only when I evaporate ethyl acetate does it precipitate.

 

[lapgan1]

Heat until the odor of ethyl acetate is gone. use acid hcl 36%

 

[Polka999]

even if lines split after finishing adding HCL you should be good to go. they will still crystalize inside fridge (at least for me they crystalized)

 

[G.Patton]

Hello, yes, it is okay.