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Fenilacetona (P2P) sintēze no benzaldehīda ar butanonu
- Thread starter William D.
- Start date
Es grasos izmēģināt šo sintēzi ar dihlormetānu (DCM). Es neredzu, ka tas būtu problēma, tikai tas, ka tas būs smagāks par ūdeni. Vai ir kādi iemesli, lai neizmantotu viegli pieejamo DCM un nesintezētu hloroformu?
Can 3-methyl-4-phenyl-3-buten-2-one be distilled without vacuum?
- By waltjr5858
Lol it turned to some bad stuff without vac... I went on to the next step the next time with some minor cleaning and no distillation....I didn't clean up till the end with steam distillation... works fine... yield still plenty good enough. I hate the way that stuff vac distilled......
- By waltjr5858
Yup so it wasn't just me... thought I screwed something up but it's pretty easy at that point HA. I've now gotten through the entire thing and just doing a steam distillation at the end and it turns out perfectly every time. Although it took some tries to get there.
Too much GAA use maybe 1.6lish
Hydrolysis is too long in my exp
1.25eq base and 2hrs worked best for me
you didnt get 50% peroxide and attempt this
will d scale up no testing time again
Purification via methylphenylbutanones bisulfite adduct is so much superior (same with p2p) both for not having to make chloroforms sake and end purity
huge excess of mek? Intentional? also amino acids r a better cat than hcl for the aldol and id use perborate for the villiger as thats higher yielding in my exp than H2O2. Percarbonate is less good getting maybe 35% but much easier and not watched at all
Hydrolysis is too long in my exp
1.25eq base and 2hrs worked best for me
you didnt get 50% peroxide and attempt this
will d scale up no testing time againPurification via methylphenylbutanones bisulfite adduct is so much superior (same with p2p) both for not having to make chloroforms sake and end purity
huge excess of mek? Intentional? also amino acids r a better cat than hcl for the aldol and id use perborate for the villiger as thats higher yielding in my exp than H2O2. Percarbonate is less good getting maybe 35% but much easier and not watched at all
- By lalalander
I'm considering purifying P2P using bisulfite, but I've read many times that the recovery is low. What is the yield after re-liberating it from the bisulfite adduct?
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- By mewnmewamine
80s and 90s just try not to have much water in solution as bisulfite adducts are annoyingly slightly soluble in them :3
- By lalalander
Does MPB form a bisulfite adduct? No matter how many times I tried, I wasn’t successful. I tried with water, and with a methanol-water mixture. It just doesn’t work.
- By lalalander
The suspected P2P adduct was left to dry on the filter. Right now, its texture is indistinguishable from that of a mica-based eyeshadow — it looks exactly like it. Like phenylacetic acid. Is this normal?
is this route can be scaled down ?
- By mewnmewamine
Things essentially always work scaled down its scaling up where things go wrong you should be good :3