Using aniline to perform a Friedel-Crafts acylation. However, the reaction failed and the aluminum trichloride reacts with the amine in an unusual way. Why is this?
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Using aniline to perform a Friedel-Crafts acylation. However, the reaction failed and the aluminum trichloride reacts with the
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- Can pyridine form a diazonium salt and can quinoline and isoquinoline undergo electrophilic substitution on the benzenoid ring but nucleophilic substitution on the nitrogen ring?Carbonyl compounds can be protonated on the carbonyl oxygen. Protonation of the carbonyl oxygen gives a species whose positive charge is delocalized by resonance. Explain why acetic acid (ethanoic acid) is more readily protonated than acetone (propanone).Explain why attempts to use esters for Friedel-Crafts acylation always lead to a complex mixture of alkylated and acylated products.
- Primary amines can also be prepared by the reaction of an alkyl halide with azide ion, followed by catalytic hydrogenation. What advantage do this method and the Gabriel synthesis have over the synthesis of a primaryamine using an alkyl halide and ammonia?How do you account for the fact that N-phenylacetamide (acetanilide) is less reactive toward electrophilic aromatic substitution than is aniline? -NHCCH, -NH, N-Phenylacetamide (Acetanilide) AnilinePrimary amines can also be prepared by the reaction of an alkyl halide with azide ion, followed by catalytic hydrogenation. What advantage do this method and the Gabriel synthesis have over the synthesis of a primary amine using an alkyl halide and ammonia?
- When trichloroacetaldehyde is dissolved in water, almost all of it is converted to the hydrate. Chloral hydrate, the product of the reaction, is a sedative that can be lethal. A cocktail laced with it is known—in detective novels,at least—as a “Mickey Finn.” Explain why an aqueous solution of trichloroacetaldehyde is almost all hydrate.When trichloroacetaldehyde is dissolved in water, almost all of it is converted to the hydrate. Chloral hydrate, the product of the reaction, is a sedative that can be lethal. A cocktail laced with it is known—in detective novels, at least—as a “Mickey Finn.” Explain why an aqueous solution of trichloroacetaldehyde is almost all hydrate.Explain why a secondary amine forms a nitrosamine rather than a diazonium ion when it reacts with a nitrosonium ion.
- We have seen that the alpha carbon atom of an enamine can function as a nucleophile in a Michael reaction, and in fact, enamines can function as nucleophiles in a wide variety of reactions. For example, an enamine will undergo alkylation when treated with an alkyl halide. Draw the structure of intermediate A and the alkylation product B in the following reaction scheme (J. Am. Chem. Soc. 1954, 76, 2029-2030): TSOH -H₂O NH A 1) CHgI 2) H₂O+ B + NH Modify the given copy of the starting material to draw compound A. If needed, use the single bond tool to interconvert between double and single bonds. Edit DrawingIn the mid-1930s a substance was isolated from a fungus that is a parasite of ryes and other grasses. This alkaloid, lysergic acid, has been of great interest to chemists because of its strange, dramatic action on the human mind. Many derivatives of lysergic acid are known, some with medicinal applications. Perhaps the best known derivative of lysergic acid is the potent hallucinogen lysergic acid diethylamide (LSD): మగవా జి N-H LSD (CH25N;O) Like other alkaloids, LSD is a weak base, with Kp = 7.6 × 107. What is the pH of a 0.94 M solution of LSD? pH =Write the mechanism for the following reactions: 1. the acid-catalyzed hydrolysis of an imine to a carbonyl compound and a primary amine 2. the acid-catalyzed hydrolysis of an enamine to a carbonyl compound and a secondary amine a. How do the two mechanisms differ?