Interpretation:
The structure with stereochemistry of the product formed when dimethylbutynedioate undergoes Diels-Alder reaction with (2E,4E) 2.4-hexadiene is to be given.
Concept introduction:
In Diels-Alder reaction, a dienophile reacts with a diene to yield a cyclic adduct. The reaction takes place through 1,4 addition of the dienophile into the diene through a cyclic transition state. These reactions occur rapidly with dienophiles having electron withdrawing substituent groups in conjugation with the double bond and if the diene adapts a s-cis conformation during the reaction.
To give:
The structure and stereochemistry of the product formed when dimethylbutynedioate undergoes Diels-Alder reaction with (2E,4E) 2,4-hexadiene.
Trending nowThis is a popular solution!
Chapter 14 Solutions
Organic Chemistry
- Bicyclo-2,5-heptadiene can be prepared in two steps from cyclopentadiene and vinyl chloride. Provide a mechanism for each step.arrow_forwardAlkylation of benzene with 1-chlorobutane in the presence of AlCl3 gave not only the expected butylbenzene product but also, as a major product, (1-methylpropyl)benzene. Write an equation for the reaction Propose a mechanism to account for the formation of butylbenzene Propose a mechanism to account for the formation of (1-methylpropyl)benzenearrow_forwardGive the structure of the main product of each of the following Diels-Alder reactions. Make sureto show the stereochemistry of the products when unambiguous.arrow_forward
- Hydrocarbon A, C10H14, has a UV absorption maximum at 236 nm and gives hydrocarbon B, C10H18, on catalytic hydrogenation. A reacts with maleic anhydride to yield a Diels-Alder adduct. Ozonolysis of A followed by zinc/acetic acid treatment yields the following diketo dialdehyde: Propose a structure for hydrocarbon Aarrow_forwardA student adds NBS to a solution of 1-methylcyclohexene and irradiates the mixture with a sunlamp until all the NBS has reacted. After a careful distillation, the product mixture contains two major products of formula C7H11Br. Draw the products obtained from each free-radical intermediate.arrow_forwardReaction of iodoethane with CN- yields a small amount of isonitrile, CH3CH2N≡C, along with the nitrile CH3CH2N≡N, as the major product. Write electron-dot structures for both products, assign formal charges as necessary, and propose mechanisms to account for their formation.arrow_forward
- Aldehydes and ketones react with thiols to yield thioacetals just as they react with alcohols to yield acetals. Predict the product of the following reaction, and propose a mechanism:arrow_forwardTreatment of a hydrocarbon A (molecular formula C9H18) with Br2 in the presence of light forms alkyl halides B and C, both having molecular formula C9H17Br. Reaction of either B or C with KOC(CH3)3 forms compound D (C9H16) as the major product. Ozonolysis of D forms cyclohexanone and acetone. Identify the structures of A–D.arrow_forwardIf phenoxide ion is allowed to react with 1-bromopentane, pentyl phenyl ether is obtained. However, if cyclohexane is used as the alkyl halide, the major products are phenol and cyclohexene. Explain how these products were formed.arrow_forward
- 3-chloro-1-butene reacts with sodium ethoxide in ethanol to produce 3-ethyoxy-1-butene. In the absence of sodium ethoxide, 3-chloro-1-butene reacts with ethanol to produce both 3-ethoxy-1-butene and 1-ethoxy-2-butene. Explain these results. Be sure to include mechanisms and structures in your explanation.arrow_forwardThe reaction of (2S)-2-chloro-3-methylpentane with sodium iodide yields two products: (2R)-2-iodo-3-methylpentane and racemic 3-iodo-2-methylpentane. Account for the formation of each of these two products. For each product, you should show how it is formed and what that tells you about the mechanism of that specific reaction.arrow_forwardWhen 3-bromo-1-methylcyclohexene undergoes solvolysis in hot ethanol, two productsare formed. Propose a mechanism that accounts for both of these productsarrow_forward
- Organic ChemistryChemistryISBN:9781305580350Author:William H. Brown, Brent L. Iverson, Eric Anslyn, Christopher S. FootePublisher:Cengage Learning