(a)
Interpretation:
An explanation as to why bromobenzene is inert is to be stated.
Concept introduction:
The nucleophilic substitution reactions are the reactions in which nucleophile attacks at the electrophilic centre. These reactions depend upon the nucleophilicity and concentration of the nucleophile. The
(b)
Interpretation:
The role of the catalyst in the given mechanism is to be stated.
Concept introduction:
The nucleophilic substitution reactions are the reactions in which nucleophile attacks at the electrophilic centre. These reactions depend upon the nucleophilicity and concentration of the nucleophile. The
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EBK ORGANIC CHEMISTRY
- The following questions concern ethyl (2-oxocyclohexane)carboxylate.(a) Write a chemical equation showing how you could prepare ethyl (2-oxocyclohexane)-carboxylate by a Dieckmann cyclization.(b) Write a chemical equation showing how you could prepare ethyl (2-oxocyclohexane)-carboxylate by acylation of a ketone.(c) Write structural formulas for the two most stable enol forms of ethyl (2-oxocyclohexane)carboxylate.(d) Write the three most stable resonance contributors to the most stable enolate derived from ethyl (2-oxocyclohexane)carboxylate.(e) Show how you could use ethyl (2-oxocyclohexane)carboxylate to prepare 2-methylcyclohexanone.(f) Give the structure of the product formed on treatment of ethyl (2-oxocyclohexane)-carboxylate with acrolein (H2C=CHCH=O) in ethanol in the presence of sodium ethoxidearrow_forwardCompound A undergoes an acid-catalyzed hydrolysis. One of the products (B) that is isolated gives the following 1H NMR spectrum. Identify the compounds A and Carrow_forwardIdentify A, B, and C, intermediates in the synthesis of the five-membered ring called an α-methylene-γ-butyrolactone. This heterocyclic ring system is present in some antitumor agents.arrow_forward
- Arrange the compounds in order of INCREASING reactivity towards bromination. Toluene, Nitrobenzene, Anisole, Aniline Acetophenone, Bromobenzene, Aniline, Phenol Acetanilide, Benzaldehyde, Toluene, Iodobenzenearrow_forwardAs a method for the synthesis of cinnamaldehyde (3-phenyl-2-propenal), a chemist treated 3-phenyl-2-propen-1-ol with K2Cr2O7 in sulfuric acid. The product obtained from the reaction gave a signal at δ5 in its 13C NMR spectrum. Alternatively, when the chemist treated 3-phenyl-2-propen-1-ol with PCC in CH2Cl2, the 13C NMR spectrum of the product displayed a signal at δ193.8. (All other signals in the spectra of both compounds appeared at similar chemical shifts.) (a) Which reaction produced cinnamaldehyde? (b) What was the other product?arrow_forwardThe Stork reaction is a condensation reaction between an enamine donor and an α,β-unsaturated carbonyl acceptor. The overall reaction consists of a three-step sequence of formation of an enamine from a ketone, Michael addition to an α,β-unsaturated carbonyl compound, and hydrolysis of the enamine in dilute acid to regenerate the ketone. Consider the Stork reaction between acetophenone and 3-buten-2-one. Draw the structure of the product of the enamine formed between acetophenone and pyrrolidine. Draw the structure of the Michael addition product. Draw the structure of the final product.arrow_forward
- What is the product resulted due to the reaction of 2-hydroxy-3-methoxybenzaldehyde with ethyl bromoacetate in a basic solution indicating all the reagents and intermediates occurred during the reaction? What is the product obtained when product A reacted with ethyl acetate in the same basic solution?arrow_forwardThe Stork reaction is a condensation reaction between an enamine donor and an α,β-unsaturated carbonyl acceptor. The overall reaction consists of a three-step sequence of formation of an enamine from a ketone, Michael addition to an α,β-unsaturated carbonyl compound, and hydrolysis of the enamine in dilute acid to regenerate the ketone. Consider the Stork reaction between cyclohexanone and propenal Draw the structure of the product of the enamine formed between cyclohexanone and dimethylamine. - Michael addition to an α,β-unsaturated carbonyl compound, and - hydrolysis of the enamine in dilute acid to regenerate the ketone.arrow_forwardPropose a mechanism for the reaction of benzyl acetate with methylamine. Label theattacking nucleophile and the leaving group, and draw the transition state in which theleaving group leaves.arrow_forward
- The reaction of cyclohexanone and N,N-dimethylamine with sodiumtriacetoxyborohydride (NaBH(OAc)3) in methanol with acetic acid (AcOH) affords N,Ndimethylcyclohexanamine in high yield. However, if anhydrous HCl is used the reaction yield of N,Ndimethylcyclohexanamine is low and a side reaction occurs to produce alcohol. Draw a reaction mechanism for the reductive amination sequence, highlighting tautomers present in the reaction.arrow_forwardDraw mechanisms for the acetylation of aniline, the bromination of acetanilide and the hydrolysis of 4-bromoacetanilide (REMEMBER: NBS generates bromine in solution) Reagents used: aniline, acetic acid, acetic anhydride to make acetanilide. Then acetanilide dissolved in acetic acid, NBS, aqHBr to make 4-bromoaxetanilinde. Then 4-bromoacetanilinde, EtOh, HCl and NaOH (to neutralise) to make 4-bromoaniline Please include drawings of the mechanisms as well as a written explanation as it helps me process exactly whats going on...arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning