How would you prepare the following compound using a Robinson annulation reaction between a ketone and an alpha, beta unsaturated ketone?

Show how you would use Robinson annulations to synthesize the following compounds. Work backward, remembering that the cyclohexenone is the new ring and that the double bond of the cyclohexenone is formed by the aldol with dehydration. Take apart the double bond, then see what structures the Michael donor and acceptor must have.

(a)

Show how you would use Robinson annulations to synthesize the following compounds. Work backward, remembering that the cyclohexenone is the new ring and that the double bond of the cyclohexenone is formed by the aldol with dehydration. Take apart the double bond, then see what structures the Michael donor and acceptor must have.

(b)

Provide the product for the following Robinson Annulation Reaction.

How would you prepare the following compound using a Robinson annulation reaction between a di-ketone and an alpha, beta unsaturated ketone?

Draw the product obtained by heating each pair of ketones in a basic solution.

a.

Draw the product obtained by heating each pair of ketones in a basic solution.

b.

What two carbonyl compounds are needed to synthesize each of the following compounds, using a Robinson annulation?

a.