Similar treatment of 3-carboethoxycoumarin gives the carboxylic acid (below), which is stable to decarboxylation. Explain why decarboxylation does not occur. CO₂Et 1) OH- 2) H+ .CO,H
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- H₂N Provide the missing structures. NH2 CH3 1) DCC N. 2) LIAIH 3) H₂O Boc₂O (1 equiv) The aliphatic amine is a stronger base/nucleophile. WhyDraw the struetre of the following three isomeic amides with chemical feruula CHNO. Amide #1: (E)-N,N-dimethyl-2-butenamide Amide #2: (7)-N-methyl-3-pentenamide Amide #3: (7)-3-hexenamide C'onsider Z sterenchemistry of alkenes. • Draw one structure per sketcher. Add additional sketchers asing the drop-down memu in the hottom right comer. Sepamte structares with - signs from the drop-down mena. O00. IF ChemDoodle ChemDoodie ChemDoodle just the first one is what I could really use help on Amide #1: (E)-N,N-dimethyl-2-butenamide+ Amines can be prepared by converting other functional groups. Classify these reactions and choose the correct reagents. NO₂ NH₂ Three reactions that can be used to prepare amines are shown below. NH₂ NH₂ NH₂ Classify these reactions. A) Elimination B) Substitution C) Reduction D) Oxidation E) Proton transfer reactions
- Name the following carboxylic acid derivatives, giving both a common name and anIUPAC name where possible.(d) PhNHCOCH2CH(CH3)2ethylamine NABH,CN One problem with reductive amination as a method of amine synthesis, is that by-products are sometimes obtained. For example, reductive zmination of benzaldehyde with ethylamine leads to the expected product, N-ethylbenzylamine However, significant amounts of N-methyldibenzylamine are also recovered. Draw curved arrows to show the movement of electrons in this step of the reaction mechanism leading to the by-product. Arrow-pushing Instructions H-A OH `H NH2 :A CH3 `CH3CH, C-OH CH;CH,-NH, + A product of the reaction above would be a(n) alkene salt secondary amine O aldehyde
- Name the following carboxylic acid derivatives. a, b, c.Which of these would likely take the LONGEST to hydrolyze (undergo hydralysis) to the carboxylic acid? 人 人 OH A. D. O All would hydrolyze rapidly B would be slowest O C would be slowest O D would be slowestAnswer the following questions based on the information provided. (a) Sildenafil (Viagra) is used to treat erectile dysfunction (impotence; inability to get or keep an erection) in men. Sildenafil (Revatio) is used to improve the ability to exercise in adults with pulmonary arterial hypertension. One of the key step of Sildenafil synthesis is shown below. OEt O OEt O i) Amine HO CHO ii) H20 washing to remove the HCI residue CI N. i) What's the structure of Amine reagent? Amine structure ii) Why does not carboxyl acid react with amine? iii) Draw the mechanism of the reaction.
- A mixture of the compounds shown below is dissolved in cyclohexane. An aqueous solution of NaOH is added to the solution, and two layers are formed. Which compound(s) is(are) found in the aqueous layer? он HO Benzoic acid Beta-naphthol Naphthalene O Benzoic acid only O Beta-naphthol only O Naphthalene O Both Benzoic acid and beta-naphthol O Both beta-naphthol and naphthaleneThe structure shown below is an intermediate in the synthesis of which biogenic amine? Use arrows to show how the next intermediate in this reaction is formed, and draw the structure of that intermediate.Show how acid derivatives hydrolyze to carboxylic acids under either acidic or basicconditions. Explain why some acid derivatives (amides, for example) require muchstronger conditions for hydrolysis than other derivatives.