Concept explainers
(a)
Interpretation:
The reaction sequences that explain the given transformations are to be stated.
Concept introduction:
In acid-catalysed Aldol condensation, nucleophilic addition of an enol takes palce at a protonated carbonyl group. In the first step, enol is formed when carbonyl oxygen gets protonated. Then, deprotonation occurs at alpha carbon. In the next step, enol adds to the protonated carbonyl followed by deprotonation to give the aldol product
(b)
Interpretation:
The reaction sequences that explain the given transformations are to be stated.
Concept introduction:
In the claisen-ester condensation, neucleophilic acyl substitution takes place on an ester. The enolate ion acts as a neucleophile. It attacks the carbonyl carbon to form a tetrahedral intermediate. Acidity of beta-keto ester products is higher than simple
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ORGANIC CHEMISTRY
- A pdf file of your hand drawn, stepwise mechanisms for the reactions. For each reaction in the assignment, you must write each mechanism three times (there are 10 reactions, so 30 mechanisms). (A) do the work on a tablet and save as a pdf., it is expected to write each mechanism out and NOT copy and paste the mechanism after writing it just once. Everything should be drawn out stepwise and every bond that is formed and broken in the process of the reaction, and is expected to see all relevant lone pair electrons and curved arrows. Aldol: NaOH HO H Δ NaOH Δarrow_forwardNonearrow_forwardDraw structures corresponding to the following names and give IUPAC names for the following compounds: (8 Point) a) b) c) CH3 CH2CH3 CH3CHCH2CH2CH CH3 C=C H3C H H2C=C=CHCH3 d) CI e) (3E,5Z)-2,6-Dimethyl-1,3,5,7-octatetraene f) (Z)-4-bromo-3-methyl-3-penten-1-yne g) cis-1-Bromo-2-ethylcyclopentane h) (5R)-4,4,5-trichloro-3,3-dimethyldecanearrow_forward
- Draw a Newman projection from carbon 3 to carbon 2 in the highest energy conformation for the following molecule. What is this conformation called? What kind of strain is present? Brarrow_forwardWhich of the following dienophiles is most reactive in a Diels-Alder reaction: Please explain why the correct answer to this question is option 5. Please provide a detailed explanation.arrow_forwardWhich of the following would you expect to be aromatic? Please provide a detailed explanation.arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning