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Topic: Addition of a side-group to a Stilbene  (Read 2397 times)

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Offline flutterby

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Addition of a side-group to a Stilbene
« on: October 20, 2008, 06:45:14 PM »
Hey,
I was just wondering what some methods of adding a side chain, for example an alkyl group, to a stilbene would be? Might it be easier to add the side group onto one of the benzene rings and then react the two benzene rings together by a wittig reaction (sp?) ? I'm sorry if this was not in depth enough!

Offline Two00proof

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Re: Addition of a side-group to a Stilbene
« Reply #1 on: October 22, 2008, 05:58:13 PM »
You could attempt a Fridel-Crafts on the desired aromatic prior to stilbene formation.  As an alternative, you could do palladium couplings.  For the stilbene formation, I wouldn't do a Wittig, I would opt for a McMurry coupling.  These tend to have a high reaction yield with an additionally high functional group tolerance.

Once you form the stilbene, you can still attempt the Fridel-Crafts, or set it up for a palladium coupling.

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