Give the starting carbonyl compounds needed to prepare the following compounds through an aldol condensation. 4....
Which one of these carbonyl compounds can not undergo aldol condensation with it self? Organometallic compounds such as CH_3MgBr behave chemically as CH_3^+ CH_3^- CH_3^+ CH_4 Which one of the following will undergo the mass spectral cleavage called the McLafferty rearrangement?
Both compounds are to go through aldol condensation and conjugate addition 12) (15 pts) Fill in the intermediate or starting materials for the retrosynthesis problems below: Aldol Condensation Conjugate Addition
3) The following compounds can be made by either an Aldol or a Claisen condensation. In each case, indicate whether the product is as result of an Aldol or a Claisen condensation AND then draw the appropriate starting material(s) that would be used to form the product. OEt (B) (D) O Et
Which of the following pairs of compounds would give the most successful crossed aldol condensation when combined in the presence of a strong base? (Note: by "successful" we mean that the reaction 1) actually works, and 2) gives only a single aldol condensation product.) Pair A: and Bu Ph H н Pair B: and Ph н н Pair C: and OMe Ph and Pair D: Pair C Pair A Pair D Pair B
Retrosynthesis. Identify the starting materials needed to make the following compound via an aldol condensation. olan =
5) Why is the Aldol reaction often called an Aldol condensation? A) The initially formed b-hydroxy carbonyl compound loses water B) The initially formed b-hydroxy carbonvl compound loses an oxygen atom. C) The initially formed b-hydroxy carbonyl compound loses a hydrogen atom D) The initially formed b-hydroxy carbonyl compound loses a hydroxyl group. 6) When is a crossed Aldol reaction said to be synthetically useful? A) When both carbonyl compounds have a hydrogens B) When one carbonyl compound has no...
1. Each of the following compounds can be prepared by a mixed aldol condensation reaction. Give the structures of the aldehyde and/or ketone precursors for each aldol product, identifying the electrophilic partner and nucleophilic partner. (6 Points) Electrophilic partner Nucleophilic partner Electrophilic partner Nucleophilic partner Electrophilic partner Nucleophilic partner
(2) Retrosynthesis. Provide the starting materials needed to yield the following products through either an aldol reaction/condensation, a Michael addition, or a Robinson annulation. If a specific base must be used to aid selectivity of any step, please specify. (20 pts)
The following Aldol Condensation produces a mixture of SIX -alpha, beta-unsaturated carbonyl products. DRAW the structure of all Six the alpha, beta-unsaturated products obtained.
23.3 Give the aldehyde or ketone precursor of the aldol condensation product (a) (b) H (c) (d) (e) 23.3 Give the aldehyde or ketone precursor of the aldol condensation product. where was the OH in the aldol product before loss of H,0 to give the enone?