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Topic: Synthesis of a Aryl-Ethyl-Ether from ArylAmine  (Read 4358 times)

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Offline Dibromofunkatol

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Synthesis of a Aryl-Ethyl-Ether from ArylAmine
« on: April 03, 2008, 06:18:26 PM »
Hello,

I have a starting compound of what appears to be a primary Arylamine, Ar-NH2.
From that I want to make a phenyl ethyl ether, Ar-O-CH2-CH3.

This is what I have attempted:
Start With AR-NH2
React 1: Diazotination: HONO, HCL, 0 degrees Celcuis
Product 1: AR-NN+ (Diazonium ion)
React 2: Sandmeyer Reaction: Cu2O, Cu 2+, H20
Product 2: AR-OH
React 3: NaOH
Product 3: AR-O- ?
React 4: Primary Alkyl Halide Reaction? : CH3CH2I
Product 4: AR-O-CH2-CH3

Would this work?

Thanks



Offline Rabn

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Re: Synthesis of a Aryl-Ethyl-Ether from ArylAmine
« Reply #1 on: April 03, 2008, 06:47:13 PM »
There must be a mechanism through which you could substitute ethanol directly releasing NH3.

Offline Dibromofunkatol

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Re: Synthesis of a Aryl-Ethyl-Ether from ArylAmine
« Reply #2 on: April 03, 2008, 08:27:10 PM »
Are you referring to the NN+ ion?  There isn't a NH3 group in the problem.  It's NH2 and to my understanding that directs any attack on the aryl ring to the ortho and para positions. 

Offline macman104

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Re: Synthesis of a Aryl-Ethyl-Ether from ArylAmine
« Reply #3 on: April 03, 2008, 08:30:48 PM »
There must be a mechanism through which you could substitute ethanol directly releasing NH3.
None that I'm aware of.  I forget the exact reagents that for the Phenol formation, but the williamson synthesis you've proposed seems fine.

EDIT:  Dibromo, I believe Rabn, is talking about substituting directly the ethanol, in which, you would have to do something with the H on the ethanol, so then you'd lose NH3, but I don't know of any way to do that.

Offline Dibromofunkatol

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Re: Synthesis of a Aryl-Ethyl-Ether from ArylAmine
« Reply #4 on: April 03, 2008, 08:47:40 PM »
Ok cool, I'm going to go with it.  Thank you both.

Offline agrobert

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Re: Synthesis of a Aryl-Ethyl-Ether from ArylAmine
« Reply #5 on: April 03, 2008, 09:33:37 PM »
Why not work up you diazo salt NN+ with ethanol instead of water.  Definitely plausible but may be tricky to do it anhydrously.
In the realm of scientific observation, luck is only granted to those who are prepared. -Louis Pasteur

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