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Topic: TLC question (again)  (Read 1870 times)

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Offline Unco

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TLC question (again)
« on: June 05, 2015, 12:05:00 AM »
If I want to monitor the formation of the enolate after adding a strong base to the alpha saturated ketone, is there a way to visualize it on TLC? As in a way such that the enol form won't get turn back to its keto form on the TLC since silica is acidic. If not, is there another way to tell if I am forming the enolate quantitatively in the reaction vessel?

Offline discodermolide

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Re: TLC question (again)
« Reply #1 on: June 05, 2015, 12:26:22 AM »
Well TLC won't work here. The best way is to remove a sample and add D2O or some other deuteration agent. Work it up and get an NMR of your deuterated starting material. You should see only a 2H signal corresponding to alpha protons instead of a 3H integral, if its gone 100%.
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Offline Unco

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Re: TLC question (again)
« Reply #2 on: June 05, 2015, 02:04:22 AM »
cool, maybe i will try that

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