Sinteza 1-fenil-2-propanona (P2P) iz dietil(fenilacetil)malonata

ryan

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IlkqYCsUOz


vsakdo lahko pomaga
Po končanem peturnem refluksu sem zmes prenesel v ledeno kopel in nameraval narediti alkalno pH(12)

Sprva je vse potekalo dobro, vendar sem naredil napako in dvignil pH na 14, zaradi česar se je zmes strdila.

Ali lahko zmes še vedno uporabim?"
 
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ryan

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DIBDm9VTKZ

(slika 1)

QgBjW5mMhy

(Slika 2)

Gospod, potrebujem vašo pomoč. Refluks sem izvajal 7 ur pri 55 stopinjah Celzija, pri čemer so bili v erlenmajerici že vreli žetoni. Po refluksiranju sem zmes postavil v ledeno kopel in dodal približno 260 ml 20-odstotne raztopine NaOH, da bi zmes postala alkalna (pH 13). Ko pa je zmes postala alkalna, se je spremenila v nepravilne grudice (slika 1). Nato sem mešanici dodal 50 ml dietiletra in grudice so postale enakomerne in so plavale na vrhu mešanice, kot je prikazano na sliki 2.

Kaj se je zgodilo? Ali sem naredil napako?
 
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hacke8

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Uporabljate kislino BMK, kajne? Temperaturo povratnega toka je najbolje nastaviti na 70-75. 4 ure, ohlajanje po končani reakciji, ni treba prilagajati PH na 13, PH7 je dovolj, za ekstrakcijo RM uporabite DCM, čiščenje P2P, da preverite druge niti.
 

ZMI_AA0B

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Idila, kateri vrhunski mešalnik je primeren? Ker sem zbral 800 mililitrov dietil malonata in želel sintetizirati fenilaceton
 

hacke8

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Čim večja je moč, tem bolje. Mešalna lopatka mora biti izdelana iz PTFE. Okus tega izdelka 20320-59-6 je zame res nesprejemljiv. Na vas bo ostal dolgo časa.
 

ZMI_AA0B

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Učiteljica, ali lahko vprašam, kako se dietil malonat pretvori v dietil fenilacetil malonat?
 

ZMI_AA0B

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Kako se dietil malonat spremeni v dietil fenilacetil malonat
 

ZMI_AA0B

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Izkazalo se je, da sta dietilfenilacetat in dietil malonat različna
 

ZMI_AA0B

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Ali lahko vprašam, kaj storiti, če v dietil malonatu primanjkuje fenilacetila?
 

VectorLaboratories

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Skoraj bom izvedel to sintezo, vendar me skrbi, da bom naletel na nekatere težave, o katerih se je razpravljalo v tej temi.

Uporabnik je poročal o vmesnem produktu z nizkim vreliščem, zaradi česar je pri kondenzaciji izgubil produkt.

@G.Patton je predlagal, da je treba v sistemu ustvariti večji tlak.

Kako lahko to storimo, če uporabljamo enega od reaktorjev, prikazanih v videoposnetku?
 

B APPLE

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Ali želite dodati 40 ml ali 240 ml destilirane vode?
 

B APPLE

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Zakaj ne moremo razslojiti z etrom?
 

B APPLE

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Ali je normalno, da raztopina postane motna, potem ko jo trikrat ekstrahiramo z etrom in speremo z 200 ml vode
 

B APPLE

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Oprostite, učiteljica! Kako obnoviti temno rdečo barvo fenilocetne kisline in fenilacetona, ki sem ju sintetiziral
 

G.Patton

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Kaj pomeni "obnoviti rdečo barvo"????
 

B APPLE

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Hvala, učiteljica! Našel sem razlog. Hvala.
 

B APPLE

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Po uporabi metode, ki jo je naučil učitelj, mi je končno uspelo s fenilacetonom
 

B APPLE

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Ali lahko svetujete relativno preprosto metodo za sintezo metamfetamina iz fenilacetona? Hvala!
 
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