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- When the nitrogen-containing aromatic heterocyclic compounds 1 and 2 are treated with HCl, only 1 forms the hydrochloride salt, whereas compound 2 is unreactive. Provide an explanation for this observed reactivity.Explain why pyridine N-oxide G can undergo nucleophilic aromatic substitution with nucleophile Nuc– to give product I. Include the resonance structures of pyridine N-oxide G to illustrate your answer.The compound below is treated with chlorine in the presence of light
- (−)-Hyoscyamine, an optically active drug used to treat gastrointestinal disorders, is isolated from Atropa belladonna, the deadly nightshade plant, by a basic aqueous extraction procedure. If too much base is used during isolation, optically inactive material is isolated. (a) Explain this result by drawing a stepwise mechanism. (b) Explain why littorine, an isomerisolated from the tailower plant in Australia, can be obtained optically pure regardless of the amount of base used during isolation.Choose among the synthetic steps provided in order to propose a reasonable stepwise preparation of the following compound A starting from benzene.#12. Outline a synthesis of the following molecules starting with ethyne and CH2I2 as the only carbon sources and any needed inorganic reagents. Obviously more than one ethyne molecule is needed for each of the syntheses.
- Compound A produce compound D while undergo Friedel Crafts Alkylation. Compound D is then oxidized and produce compound E (C11H12O3) as a major product.What are the possible structural formula of compound D and E?a) Which base would be the best base to use for both of these and why? b) Give the expected product for the Claisen condensation reaction of A). c) Compound A) will successfully undergo a Claisen condensation reaction, however, Compound B) will not. Briefly explain why, and show the form of the product for Compound A) that makes the reaction possible.Part A) conduct a simplifying retrosynthetic analysis of B. Part B) suggest a set of specific reactions and conditions to prepare B starting from A. Pay attention to relative stereochemistry.
- Outline a feasible synthetic route for the following:Outline a synthesis for the following transformation and provide a justification for your chosen strategy. (More than one steps may be required)Propose a feasible synthesis for diphenylacetylene from bromobenzene. Draw the reaction scheme and briefly describe the reaction.