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The active ingredient of the insect repellent Off is N, N-diethyl-m-toluamide,
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Organic Chemistry
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- N,N-Diethyl-m-toluamide (DEET) is the active ingredient in many insect-repellent preparations. How might you synthesize this substance from m-bromotoluene?arrow_forwardPQ-20. This type of reaction, typical of carboxylic acids, esters, acid halides, anhydrides and amines, is called: (A) a bimolecular nucleophilic substitution. (C) an electrophilic substitution. (A) (A) H3C-C-OCH₂CH3 OH R CI PQ-21 What would be hydrolyzed most slowly with aqueous NaOH? lo (B) OH₂ (C) H3C-C-OCH₂CH3 H3C-C- H CI + H₂O (B) a nucleophilic addition. (D) a nucleophilic acyl substitution. (C) PQ-22. Which structure is a reasonable intermediate in the acid-catalyzed hydrolysis of ethyl acetate, shown, in dilute aqueous acid? RiOH OH (D) H3C- (D) OH (B) H3C-C-OCH₂CH3 OH₂ + HCI si inarrow_forwardPropose a synthesis for ibutilide starting with aniline, methanesulfonyl chloride, succinic anhydride, and N-ethyl-1-heptanaminearrow_forward
- 2-Propylpentanoic acid (valproic acid) is an effective drug for treatment of several types of epilepsy, particularly absence seizures, which are generalized epileptic seizures characterized by brief and abrupt loss of consciousness. Propose a synthesis of valproic acid starting with diethyl malonate.arrow_forwardProvide reagentsarrow_forwardH3C OH 1. Br2, PBг3 2. H₂O H3C OH Br The a-bromination of carbonyl compounds by Br₂ in acetic acid is limited to aldehydes and ketones because acids, esters, and amides don't enolize to a sufficient extent. Carboxylic acids, however, can be a-brominated by first converting the carboxylic acid to an acid bromide by treatment with PBr3. Following enolization of the acid bromide, Br2 reacts in an a-substitution reaction. Hydrolysis of the acid bromide completes the reaction. Draw curved arrows to show the movement of electrons in this step of the mechanism. Arrow-pushing Instructions Br Br зь P-Br Br H₂C H₂C SH Br Brarrow_forward
- As far back as the 16th century, South American Incas chewed the leaves of the coca bush, Erythroxylon coca, to combat fatigue. Chemical studies of Erythroxylon coca by Friedrich Wöhler in 1862 resulted in the discovery of cocaine, C17H21NO4, as the active component. Basic hydrolysis of cocaine leads to methanol, benzoic acid, and another compound called ecgonine, C9H15NO3. Oxidation of ecgonine with CrO3 yields a keto acid that readily loses CO2 on heating, giving tropinone. (a) What is a likely structure for the keto acid? (b) What is a likely structure for ecgonine, neglecting stereochemistry? (c) What is a likely structure for cocaine, neglecting stereochemistry?arrow_forwardTreatment of 1-aminoadamantane, C10H17N, with methyl 2,4-dibromobutanoate in the presence of a nonnucleophilic base, R3N, involves two successive SN2 reactions and gives compound A. Propose a structural formula for compound A.arrow_forwardDihydropyran is synthesized by treating tetrahydrofurfuryl alcohol with an arenesulfonic acid, ArSO3H. Propose a mechanism for this conversion.arrow_forward
- Draw a resonance structure of the acetonitrile anion, -: CH2CN, and account for the acidity of nitriles.arrow_forwardGive Reaction of +NO with 1° Amines ?arrow_forwardBrasilenyne is isolated from the digestive gland of the sea hare; it shows significant antifeedant activity. Choose the best reagents to complete the final reaction in the synthesis of brasilenyne. HO U Q A B C SOCI2 pyridine PBr3 DMF NaCl DMF Cl2arrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage LearningIntroduction to General, Organic and BiochemistryChemistryISBN:9781285869759Author:Frederick A. Bettelheim, William H. Brown, Mary K. Campbell, Shawn O. Farrell, Omar TorresPublisher:Cengage Learning