QUESTION 38 Select the DIENEOPHILE that would be required to make the following molecule by a Diels-Alder reaction. H3CO & DIENEOPHILE CO₂CH3 CO₂CH3 -CO₂CH3 CO₂CH3 CO₂CH3 D A B OA B
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- Alec wanted to prepare to diene B to use in a subsequent Diels-Alder reaction. He thought he could prepare it via the reaction shown below. However, treatment of the diol (A) with acid yield either ketone (C) as the major product. H,SO, HO IPh Нeat Ph Ph OH B C a. Give a detail account of how you would determine whether product of the reaction was B or C. Assume that the only method available to you is FT-IR. You must give values for all features of all spectra. b. Provide a detail mechanism as to how compound B and C are formed under the reaction conditions. ..D) 22. Which of the following WILL NOT act as a diene reactant in a Diels-Alder reaction? B) OCH3Cyclopentadiene is unusually acidic for a hydrocarbon. Which of the following explains why that is? The carbon atoms of cyclopentadiene are all sp hybridized. A В Cyclopentadiene is aromatic. Removal of a proton from cyclopentadiene yields an C aromatic anion. Removal of a hydrogen atom from cyclopentadiene yields a highly stable free radical. D Removal of a hydride ion from cyclopentadiene produces an E aromatic cation. H H. cyclopentadiene
- to doinw 4. -> A) Which of the following is NOT a suitable diene for a Diels-Alder reaction? ultiple alkylation B) HBr CHEM 242 Activity 2.1-Conjugated-Systems D) 5. In the addition of HBr to 1,3-butadiene, one product is called the kinetic product and the other is called the thermodynamic product. doccriptors that apply to the kinetic product.3. What condition(s) would you use to convert the Diels-Alder product (boxed) into each of the diastereomeric diol-imides A, B, and C below. H 30-40-50 1 HO,, HO H H A N ? HO,,. HO C (racemic) ? но. HO H H BWhat diene and dienophile are needed to prepare each compound by a Diels–Alder reaction?
- (a) Draw the major products A, B, and C for the Diels-Alder reactions below. A EtO2C. + В `CO̟EtCyelopenta dicne trans va dimethoxy etham Can anyone show me what a Diels-Alder reaction would look like with cyclopentadiene and trans 1,2 dimethoxyethene? What would be the product? Thank you!PQ-21. From the standpoint of reactivity, which is the poorest dienophile to react with 2,3-dimethyl-1,3-butadiene in a Diels-Alder reaction? H (A) CO2CH3 (B) (C) (D) CN
- d. Identify the starting materials that can be used to produce the compounds shown using a Diels-Álder reaction.. СООН ? CO2CH3 CO2CH3Which of the following could be the most effective replacement for maleic anhydride in the Diels- Alder reaction? MeOOC || OIV COOMe 11 MeOOC IV COOMeWhat dene and dienophile is needed to prepare the following compound via a Diels-A der reaction? Choices A. a and b c and d e and f c and f C. D. b ane Ck Soe nd Submit to save and