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does this synthesis work?
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Topic: does this synthesis work? (Read 4834 times)
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rleung
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does this synthesis work?
«
on:
March 20, 2006, 03:22:13 PM »
Hi,
I am wondering if this synthesis works. Thanks.
Ryan
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Albert
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Re:does this synthesis work?
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Reply #1 on:
March 20, 2006, 03:49:24 PM »
I don't think so.
Mind you, do you need to synthesize the final product you drew from that derivative of cyclohexanone? Can't you start from a different compound?
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rleung
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Re:does this synthesis work?
«
Reply #2 on:
March 20, 2006, 04:08:44 PM »
Hi,
Nope, I have to start from the reagent I used and end up with the product I need. If I convert the acyl chloride into an ester using SOCl2/CH3OH, that would be better, right?
Ryan
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Albert
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Re:does this synthesis work?
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Reply #3 on:
March 20, 2006, 04:16:29 PM »
I sincerely doubt you can use NaOH as a base, because I think it'd react with the-CN group to yield a carboxylic acid.
If I were you, I'd choose NaH.
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movies
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Re:does this synthesis work?
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Reply #4 on:
March 20, 2006, 04:22:59 PM »
Acid chlorides tend to acylate on the oxygen of an enolate in preference to the carbon atom of an enolate.
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netscape
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Re:does this synthesis work?
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Reply #5 on:
March 22, 2006, 03:06:53 PM »
I'm afraid this synthesis won't work, even using NaH as base and an ester instead of acyl chloride. I see two potential problems:
1) Regioselective issue: There is really no real preference to which side of the cyclohexanone is going to be deprotonated. They are equally substituted.
2) Use of a base to deprotonate the position you want may also lead to elimination of CN- to give an cyclohexenone.
You may get some product , but the yield will be low and it might be messy.
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does this synthesis work?