1. Propose reasonable synthetic pathways for the conversion of the given starting materials into therespective products. Reagents (building blocks) containing one carbon atom may be assumed as beingreadily available.OMeOMeCHOMeOOMeOHMeOHOEtOодяOHNH₂

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Answered: 1. Propose reasonable synthetic…

Organic Chemistry

9th Edition

ISBN:9781305080485

Author:John E. McMurry

Publisher:John E. McMurry

Chapter22: Carbonyl Alpha-substitution Reactions

Section22.SE: Something Extra

Problem 26MP: Nonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium...

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Nonconjugated , -unsaturated ketones, such as 3-cyclohexenone, are in an acid-catalyzed equilibrium with their conjugated , -unsaturated isomers. Propose a mechanism for this isomerization.
Provide step by step total synthesis of the following target compounds using the starting material provided.
2. Provide the structure of the products of each of the following synthetic transformations NaNH2 2 Li, 2 MeOH CH3Br C NH3
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3. Provide the products or the necessary reagents for the two following transformations. 1. NaNH2 2. CH3BR 1-butyne НСЕCH НCЕCH 3. NANH2 4. CH3CH2B name of this compound?
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Indicate the products or reagents of the following transformations.
14. Which reactant can be treated with 1) LiAlH4, 2) H2O to create the molecule shown below: H3C C -N- C CH3 Н2 H H₂ A) N-ethylethanamide (common name: N-ethylacetamide) B) ethanenitrile (common name: acetonitrile) C) ethanamide (common name: acetamide) D) butanenitrile
CH3 Ph3P-CHCH3 H3C H3C Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction. In the reaction, a triphenylphosphorine ylide, also called a phosphorane, adds to an aldehyde/ketone to give a four-membered cyclic intermediate called an oxaphosphetane. The oxaphosphetane is not isolated but instead spontaneously decomposes to release triphenylphosphine oxide and an alkene. Ph3P-CHCH3 H3C The ylide is formed by reaction of triphenylphosphine, a good nucleophile, with a primary alkyl halide in an S 2 reaction, followed by deprotonation of the carbon with a strong base, such as butyllithium. The carbonyl carbon and the carbon originally bonded to the halogen become the two carbons with the double bond in the product alkene :0: CH3 Com The real value of the Wittig reaction lies in its ability to yield an alkene of predictable structure, as the C-C bond is precisely where the C=O bond was in the reactant and no isomers (other than…
1. Methylene cyclohexane, on treatment with strong acid, isomerises to yield methyl cyclohexene. Propose a mechanism by which the reaction might occur.
МЕСНANISMS 1,2-epoxy-1-methylcyclopentane undergoes both acid-catalyzed and base-catalyzed opening of the epoxide ring to form two different products. > Using ethanol as the solvent and an appropriate acid, show the steps in the acid catalyzed mechanism, writing structures for all products of the steps. Circle the major product(s). > Using ethanol as the solvent and an appropriate base, show the steps in the base- catalyzed mechanism, writing structures for all products of the steps. Circle the major product(s). 1,2-epoxy-1-methylcyclopentane CH3
Which of the following statements best describes the general reactivity of alkynes? O An alkyne reacts as an electrophile and is therefore electron poor. O An alkyne reacts as an electrophile and is therefore electron rich. O An alkyne reacts as a nucleophile and is therefore electron poor. O An alkyne reacts as a nucleophile and is therefore electron rich. O Alkynes fail to undergo electrophilic addition reactions, unlike alkenes.

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1. Propose reasonable synthetic pathways for the conversion of the given starting materials into the respective products. Reagents (building blocks) containing one carbon atom may be assumed as being readily available. OMe OMe CHO MeO OMe OH MeO HO EtO одя OH NH₂