(a)
Interpretation:
The curved arrow mechanism of the formation of compound A is to be stated.
Concept introduction:
(b)
Interpretation:
The three basic steps of electrophilic aromatic substitution in the mechanism are to be stated.
Concept introduction:
An electrophile is a positive species which has an affinity towards negative charge.
The
(c)
Interpretation:
The product obtained if the reaction b followed the usual directing effects of alkyl substituents is to be stated. A reason as to why the celestolide instead of the expected product is formed is to be suggested.
Concept introduction:
The replacement of hydrogen atom attached to a carbon atom of electron-rich benzene ring by an incoming electrophile is known as electrophilic aromatic substitution reaction. The rate of electrophilic aromatic substitution reaction depends on the substituted group on the aromatic ring. The ring deactivating group retards the electrophilic aromatic substitution reaction and ring activating group enhances the electrophilic aromatic substitution reaction.
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ORGANIC CHEMISTRY SAPLING ACCESS + ETEX
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- the following reaction scheme leads to the formation of compound B. give the structure of the final products and of the intermediate product A and justify, using the mechanism, the formation of thesearrow_forward(b) A student wanted to synthesize methyl tert-butyl ether. He attempted the synthesis by adding sodium methoxide to tert-butyl chloride, but he obtained none of the desired product (1) (ii) Use an equation to show the product formed in this reaction Propose a suitable William ether synthetic route for methyl tert-butyl ether tach l.arrow_forward(a) What reagents would be used for the conversion of alkene A into the target? (b) What reaction is involved in the conversion of alcohol B into alkene A? Suggest a reagent that might affect this transformation. (c) Give a retrosynthetic analysis showing the disconnection of B, the synthons produced that lead to the synthetic equivalents given (draw their structures).arrow_forward
- (b) (c) Suggest a synthesis of the following compound (D) which utilises a conjugate addition strategy. Explain your reasoning clearly by drawing the mechanism. D Ph3P Me Predict the product and provide a mechanism for each of the following transformations; (i) Harrow_forward18.18 Provide a structural formula for the product from each of the following reactions. (a) (c) (e (1) LDA (2) CH,CH,I NaH CI (b) (d) O. (f Br, CH,CO,H Br, (excess), NaOHarrow_forwardOutline a synthesis of each of the following compounds from isopropyl alcohol. A compound prepared in one part can be used as a reactant in another. (Hint: which of the compounds shown can serve as a starting material to all others?)arrow_forward
- (a) Account for the following :(i) Propanal is more reactive than propanone towards nucleophilic reagents.(ii) Electrophilic substitution in benzoic acid takes place at meta position.(iii) Carboxylic acids do not give characteristic reactions of carbonyl group.(b) Give simple chemical test to distinguish between the following pairs of compounds:(i) Acetophenone and benzaldehyde(ii) Benzoic acid and ethylbenzoate.arrow_forwardthe following reaction scheme leads to the formation of compound C. give the structure of the final product C and of the intermediate products A and B and justify, using the mechanism, the formation of the product A. Give the serereochemistry of the final product obtainedarrow_forwardEach of the following reactions has been carried out under conditions such that disubstitution or trisubstitution occurred. Identify the principal organic product in each case. (a) Nitration of p-chlorobenzoic acid (dinitration) (b) Bromination of aniline (tribromination) (c) Bromination of o-aminoacetophenone (dibromination) (d) Bromination of p-nitrophenol (dibromination) (e) Reaction of biphenyl with tert-butyl chloride and iron(III) chloride (dialkylation) (f) Sulfonation of phenol (disulfonation)arrow_forward
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