Many of the condensations we have studied are reversible. Reverse reactions often give the prefixretro-, from Latin meaning "backwards." Propose mechanisms to explain the following reactions.CH, HCH,OHCH,(retro-aldólica y condensación posterior)CH,(d)а-OH"OCHCH₂OHCOOCH3(retro-aldólica y de Claisen cruzada)

Answered: Many of the condensations we have…

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter20: Carboxylic Acids And Nitriles

Section20.SE: Something Extra

Problem 57AP: A chemist in need of 2,2-dimethylpentanoic acid decided to synthesize some by reaction of...

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The intramolecular Aldol condensation of 2,6-heptanedione with base may produces two possible B-hydroxyl ketones as shown in the following reaction pathway. CH, (1) OH CH, (A) 3-Methyl-2-cyclohexenone CH, CH, (2) Он CH, 2,6-Heptanedione (B) Methyl(2-methyl-1-cyclobutenyl)ketone (i) Write detailed mechanisms for both the reactions (1) and (2).
(ORGANIC CHEMISTRY) (mechanisms) please give a answer for the following mechanism. Provide a detailed stepwise mechanism for the following transformation.
Propose a mechanism for the formation of (A)
The intramolecular Aldol condensation of 2,6-heptancdione with base may produces two possible Bhydroxyl ketones as shown in the following reaction pathway. CH, (1) OH CH, (A) 3-Methyl-2-cyclohexenone .CH, CH, (2) OH - CH3 2,6-Heptanedione (B) Methyl(2-methyl-1-cyclobutenyl)ketone Write detailed mechanisms for both the reactions (1) and (2).
Write the mechanisms of the following reactions and examine the products as stereoisomeric.
The formation of Br2 from NBS first involves the reaction of NBS with HBr to form an iminol intermediate and molecular bromine. The intermediate then undergoes acid-catalyzed tautomerism to form succinimide, the byproduct of the reaction. Propose a curved-arrow mechanism for the conversion of NBS into succinimide that also accounts for the formation of Br2.
Solvolysis of the following bicyclic compound in acetic acid gives a mixture of products, two of which are shown. The leaving group is the anion of a sulfonic acid, ArSO3H. A sulfonic acid is a strong acid, and its anion, ArSO3, is a weak base and a good leaving group. Propose a mechanism for this reaction.
A chemist in need of 2,2-dimethylpentanoic acid decided to synthesize some by reaction of 2-chloro-2-methylpentane with NaCN, followed by hydrolysis of the product. After the reaction sequence was carried out, however, none of the desired product could be found. What do you suppose went wrong?
Propose a mechanism for this example of chloromethylation
Complete the reaction scheme below. Show all reagents and intermediates. No reaction is a possible answer. 1) CH3CH2M9B CH3OH H+ (ехcess) но 2) H30*, H2O B A OCH3
Propose a mechanism for this reaction. CI + Cl2 + HCI CH3COOH (racemic)
1. Propose a mechanism for the following transformation: R COOH (1) H₂C-O, (C₂H₂)₂NH (2) H₂O, acetate buffer R CH₂

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