4 of 21 3. Cycloaddition Reactions For each reaction: Describe the cycloaddition e.g. [3+3] Determine if the addition would be suprafacial or antarafacial Draw an arrow pushing mechanism Draw the structure of the major product (include stereochemistry) C
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![4 of 21
3. Cycloaddition Reactions
For each reaction:
Describe the cycloaddition e.g. [3+3]
Determine if the addition would be suprafacial or antarafacial
Draw an arrow pushing mechanism
Draw the structure of the major product (include stereochemistry)
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- What is (are) the predicted major product(s) for the reaction shown? I II III IV O O O₂N O₂N. O₂N O₂N HNO3/H2SO4 || ||| II and III O IV and I NO₂ -605 NO₂79 3. Complete the following reaction and write a mechanism for both the substitution and elimination products (both substitution and elimination products occur simultaneously). Discuss all criteria including stereochemistry when a chiral secondary primary alkyl halide with (S) configuration reacts with methanol a weak nucleophile. Draw energy profile for this reaction. (4 points) CH2CH3 CH₂O-Na+ + Br H3C (S) no 1999b 02.907 90 +201105. Predict the structure of the product formed (with correct stereochemistry) for each of following pericyclic reactions. a) b) .CI c) CH2 [1.5)-H A -CH3 d) [3,31-C A CH, hv CH CH, hv CH; [12 marks
- H H ČH3 Br р. + CH;C=C: in acetone Reaction Type(s) Mechanism(s) Product(s). Stereochemistry (if applicable) q. p-chloronitrobenzene + sodium ethoxide Reaction Type(s) Mechanism(s) Product(s). Stereochemistry (if applicable)9:50 AM Sun Nov 27 ← Question 7 of 41 Select to Draw 84% Draw the skeletal (line-bond) structure of (S)-4-isopropylcyclohex-1-ene. Use a dash or wedge bond to indicate stereochemistry of substituents on asymmetric centers, where applicable. Version: 3.78.13 +3539 production Submitbest condition for the reaction (1r,2s)-1 bromo-2methylcyclohexane->(s)3-methylcyclohex-1ene
- Write the structures of Kand L, show exactly what happens in each reaction. Cycloocta triene 80-100°C cis,cis,cis-Cicloocta-1,3,5-trieno K (C;H10) COOCH3 A K + CH;00CC=CCOOCH, L (C,H1604) COOCH3 Ciclobuteno + Ftalato de dimetilo Ftalato de dimetilo dimethyl pht he laete9. Write structural formulas for the major organic product(s) for the following reactions. Be sure to indicate stereochemistry when relevant. (CH;CH,CH,),CuLi (a) Cl Br PAL2 (b) HO (c) CH;CH,CH,CH,OH C,H5MgBr 10. Propose a reasonable mechanism for the following reaction Be sure to include all intermediates. (transition states are not necessary) Br Br hv CH3-CH=C(CH3)2 + Br, ČH,-CH=C(CH3)2 CH2=CH–Ċ(CH3)2 11. Indicate how each of the following compounds could be prepared using the given starting material CH;CH,CH,CH3 CH;CH,CH,CH,Br CH;CH,CH,CH3 H,C=CH-CH=CH2 Br CH;CHCH,CH3 CH;CH=CCH,CH3 CH36. d. e. PRINT the name of the following alkenes. Specify E/Z were necessary. CH₂CH₂CH3 1 H₂C CHC(CH3)2CH = CI Br CH₂CH3 H
- W A common alkene starting material is shown below. Predict the major product for each reaction. Use a dash or wedge bond to indicate relative stereochemistry of substituents on asymmetric centers, where applicable. Ignore any inorganic byproducts Incorrect, 1 attempt remaining OH Select to Draw Cl₂ H₂O 1. Hg(0Ac). CH₂OH 2. NaBH NaOH Select to Draw Bra 1.0₁ 2. (CH₂)2S M AChoose the structure that fits the descriptions below from the pool of choices. Use the dropdown list to select your answe swers. Pool of Choices CAT MAT RAT VAT PAT НАT A conjugated diene Choose. An isolated diene Choose. an alkene with possible rearrangement product (1,2-H shift) with reaction to HI Choose. + a diene capable of having 1,2 and 1,4-addition products Choose.10:26 None of the above 2 Arrange the following alkanes, in order of increasing the reactivity reaction toward halogens in presence of heat. CH, HC CH3 CH3 H,c CH, H-C CH3 1. TTT O I> I|> || Il>1> |II I> III > II Il >I> II| None of the above
