3) How could you use Diels-Alder reactions to prepare the following products? Show the starting diene and dienophile in each case H a. b. C. H H d. H .CO₂CH3 CN
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- 3. Predict the products of the following Diels-Alder reactions. a. NC a. 4. Identify the diene and dienophile used to make these Diel-Alder products. CN CH3 CN CH 3 CO₂CH3 CO₂CH3b) Which of these dienophiles gives the FASTEST reaction with cyclopentadiene? CH2 CH2 A. | В. C. | D. | Give structures for the major Diels-Alder product of the following reactions: 1,3- cyclohexadiene and tetrachloroethene 1,3-cylcohexadiene and fumaric acid, the trans isomer of maleic acid с.What reactants are expected to afford the following Diels-Alder adduct? H. H;C H. 請
- 4.- Predict the product for each Diels-Alder reaction. Indicate stereochemistry where appropriate. स a) b) H3C, H3C + H3C CHO A ent 10 150 COOH + ·E· <- c) COOH BAS 5.- Retro Diels-Alder: show a combination of diene and dienophile that would result in each Diels-Alder adduct.PAOLLE D 9. А 10. OMe OMe B C CO₂Me CO₂Me A+Y C+W NHCOCH3 W A+X D+Y B+Z N-Ph COMe Y 11 ||| IV V 8. Rank the dienophiles numbered W to Z in order of decreasing reactivity in a typical Diels- Alder reaction. Z Rank the dienes numbered A to D in order of decreasing reactivity in a typical Diels-Alder reaction Arrange the combinations numbered I to V in order of decreasing HOMO-LUMO gap (largest to smallest gap).9. For the following Diels-Alder products, propose the correct starting materials needed. D. a. b. C. fo{- ●●● Xox -
- In a Diels-Alder reaction, compound will react the fastest and will react the slowest. CN NH2 CN CN IV A. I, I B. I, III C. II, V D. II, I E. IV, V O A C E > > B.9. Which of the following dienes could react with acrylonitrile (dienophile in the reaction) in a Diels-Alder reaction? CH, A acrylonitrile B B. pCH, HC C CH Nal 3- Br(a) Draw the major products A, B, and C for the Diels-Alder reactions below. A EtO2C. + В `CO̟Et
- What is the major product of the Diels-Alder reaction shown? COCH, H₂ O.XX H CH₂ Select one О А. OB. OC. OD. CÓ.CH, CH₂ A H H CH₂ CO,CH, H H CO,CH, CH3 ÇO₂CH3 CH3 H Hto 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. Predict the products of the following Diels-Alder reactions. a. b. NC CN