Retrosynthesis Practice Problems

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In each reaction box, place the best reagent and c... What alkyne that does not contain O is best used t...

In each reaction box, place the best reagent and c... In each reaction box, place the best reagent and c...

Complete the following reaction equation by supply...

Each reaction box, place the best reagent and cond...

And if we do a retro aldol reaction, the mechanism is pretty much the exact reverse of an aldol condensation.

And so if we had a base like sodium carbonate, we're gonna form benzaldehyde and acid aldehyde.

Last time, we discussed aromatic reactions with electrophiles, which are very common reactions.

Today we discuss aromatic reactions with nucleophiles, in which the aromatic acts as an electrophile. A classic example is as follows: In the aryl halide at left, the carbons should be named relative to the chloride: The chloride itself is the “ipso” position, so swapping out -Cl for -OCH bound at once: The resonance structures in the intermediate provide enough stabilization to make this possible.

So we're going to start with a retro aldol reaction and see how that way of thinking can apply to retro synthesis.

And so let's start with cinnamaldehyde right here.

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