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Topic: POCl3 and Naming Question  (Read 3095 times)

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Offline amcavoy

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POCl3 and Naming Question
« on: March 24, 2008, 09:27:45 PM »
When reacting 1,2,2,6-tetramethylcyclohexanol with POCl3 and pyridine, why doesn't the product follow Zaitsev's Rule?  My professor said that a double bond would form between the 1-carbon and the 1-methyl carbon rather than the 1-carbon and the 6-carbon (as I would expect).  Why is this so?  Also, what is the name of this product?

Thanks.

Offline sjb

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Re: POCl3 and Naming Question
« Reply #1 on: March 25, 2008, 05:14:14 AM »
Was it a particular diastereomer that you were told would not form the alkene between carbons 1 and 6?

The only thing I can think of at the moment is that the OH and the methy group at C6 were trans to each other, so antiperiplanar elimination may not occur.

Which compound did you want to know how to name - your expected or the observed?

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