A carbamate can be prepared by treating an isocyanatewith an alcohol, as shown here. This type of reaction isused to synthesize polyurethanes- polymers that havea wide variety of industrial applications, such as surfacesealants, high-performance adhesives, and syntheticfibers. Propose a mechanism for this transformation.R'—ОНR.`N=C=0R.OR'An isocyanateA carbamate(Substituted urethane)O=C

Carbamate- Carbamate is polyurathane polymer. Carbamate is used in synthesis of urea. Carbamate is…

Answered: A carbamate can be prepared by treating…

Organic Chemistry

8th Edition

ISBN:9781305580350

Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Publisher:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. Foote

Chapter19: Enolate Anions And Enamines

Section: Chapter Questions

Problem 19.48P

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A chemist synthesized compound X as a racemic mixture. When the ketone group in X was enzymatically reduced to the corresponding alcohol, a 100% yield was obtained of the product shown below. Choose the statement that best describes this result. ОН enzyme C;H1 `OCH,CH; pH 4.0 C3H1 `OCH,CH3 ОН ÕH X (racemic) (100% yield) One enantiomer of compound X reacts quickly with the enzyme. The other enantiomer of compound X is unreactive, but rapidly equilibrates with the reactive enantiomer under the reaction conditions. Since compound X was racemic, it makes sense that only a single product was obtained. O The product is a meso compound, so either enantiomer of compound X gives the same product. One enantiomer of compound X reacts quickly with the enzyme, while the other enantiomer of compound X remains unchanged.
6) Which is the organic product for the following reaction? (a) (b) (c) (d) сон COOH ОН ОН COOH COOH KMnO4 H2O
Class 11 Chem
| Exercises 317 9.21 Identify the reactants from which the following molecules were prepared. If an acetal, identify the carbonyl compound and the alcohol; if an imine, identify the carbonyl compound and the amine; if an alcohol, identify the carbonyl compound and the Grignard reagent (red = 0, blue = N): (a) (b) (c)
20:24 : ●●● E) 03 12. Fill in the box with the major organic product of the first step of the reaction shown? The first step of the reaction shown is an exhaustive methylation and is one of the SN2, SN1, E2, or E1 reactions. Another piece of information about this full reaction, the second step proceeds via an E2 mechanism. xs CH₂l 13. What is the name of the reaction in the previous question? A) Swern Oxidation Hofmann Elimination ABCD Ag₂O, A Cope Elimination Williamson Ether Synthesis Send a chat O
shawl the detailed beland the neaction Label each спе of the reaction the ardor listed belanu. of part of the defalled mechanism wing of the terms listed.. - ester hydrolysis decarboxylaton Keto- endi tautomensin reaction. mechanism proceeds in •OCN3 OH 1130 + он '+' CH 3 CH + CO₂
4) Propose a synthetic pathway to prepare 2-methyl-propan-2-ol from propane. You're allowed to use any reagents you like but all the carbon atoms in your product should come from the propane. он It must be propanone otherwise the conversion would be too long.
Give the major organic product(s) for each of the following reactions. Write NR if a reaction will not occur.
CH3 Ph3P-CHCH3 H3C H3C Aldehydes and ketones are converted into alkenes by means of a direct nucleophilic addition called the Wittig reaction. In the reaction, a triphenylphosphorine ylide, also called a phosphorane, adds to an aldehyde/ketone to give a four-membered cyclic intermediate called an oxaphosphetane. The oxaphosphetane is not isolated but instead spontaneously decomposes to release triphenylphosphine oxide and an alkene. Ph3P-CHCH3 H3C The ylide is formed by reaction of triphenylphosphine, a good nucleophile, with a primary alkyl halide in an S 2 reaction, followed by deprotonation of the carbon with a strong base, such as butyllithium. The carbonyl carbon and the carbon originally bonded to the halogen become the two carbons with the double bond in the product alkene :0: CH3 Com The real value of the Wittig reaction lies in its ability to yield an alkene of predictable structure, as the C-C bond is precisely where the C=O bond was in the reactant and no isomers (other than…
Q2:Write the structure of the product formed in each case (A) C6H₂CH₂CCH₂C6H₁ H₂C=CHCCH3 NaOCH, CH₂OH
Rank the following carboxylic acid derivatives in decreasing order (most to least) of reactivity towards nucleophilic substitution. O I > IV > II| > || O || > ||| > IV > I O | > ||| > | > IV O III > IV> | > | O IV > I > III > || = ||| CI OCH3 11 IV NH₂ ONa
If the following compound is saponified with sodium hydroxide, the products are: O || CH3(CH2) 14CH2-C-O-CH₂CH3 an ester and an alcohol an alcohol and a salt an acid and a salt an acid and an alcohol The purpose of the acid catalyst in the hydrolysis of an amide is: to enhance the nucleophilicity of the water molecule to enhance the electrophilicity of the amide carbonyl carbon to enhance the electrophilicity of the water molecule to shift the equilibrium of the reaction Which of the following compounds has the highest boiling point? CH3CH3 CH3CH2OH CH3-0-CH3 CH3COOH

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