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Aldehydes Ketones and Carboxylic Acids question

2018 · Shift 2 · Q16
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Aldehydes Ketones and Carboxylic Acids question

2018 · Shift 2 · Q16

JEE AdvancedChemistryAldehydes Ketones and Carboxylic AcidsMCQ+3 / −1
The desired product XXX can be prepared by reacting the major product of the reactions in LIST-I with one or more appropriate reagents in LIST-II (given, order of migratory aptitude: aryl > alkyl > hydrogen) JEE Advanced 2018 Paper 2 Offline Chemistry - Aldehydes, Ketones and Carboxylic Acids Question 66 English The correct option is
  1. A
    P−1;Q−2,3;R−1,4;S−2,4P - 1;Q - 2,3;R - 1,4;S - 2,4P−1;Q−2,3;R−1,4;S−2,4
  2. B
    P−1,5;Q−3,4;R−4,5;S−3P - 1,5;Q - 3,4;R - 4,5;S - 3P−1,5;Q−3,4;R−4,5;S−3
  3. C
    P−1,5;Q−3,4;R−5;S−2,4P - 1,5;Q - 3,4;R - 5;S - 2,4P−1,5;Q−3,4;R−5;S−2,4
  4. D
    P−1,5;Q−2,3;R−1,5;S−2,3P - 1,5;Q - 2,3;R - 1,5;S - 2,3P−1,5;Q−2,3;R−1,5;S−2,3
View written solutionFree

Correct answer: D

The question refers to LIST-I, LIST-II, and the target product XXX, but the uploaded text does not include the actual reaction schemes / structures for:

  1. the compounds in LIST-I labeled P,Q,R,SP,Q,R,SP,Q,R,S
  2. the reagents in LIST-II labeled 1,2,3,4,51,2,3,4,51,2,3,4,5
  3. the structure of the desired product XXX

Without these structures, the problem cannot be solved reliably, because the answer depends entirely on:

  • what the major products of P,Q,R,SP,Q,R,SP,Q,R,S are,
  • which rearrangements/oxidations/reductions/reagent combinations correspond to 111 through 555,
  • and how they convert into the target XXX.

The note about migratory aptitude aryl>alkyl>hydrogen\text{aryl} > \text{alkyl} > \text{hydrogen}aryl>alkyl>hydrogen indicates that some step likely involves a Baeyer–Villiger oxidation / rearrangement, but that alone is not enough to determine the correct option.

What is needed

Please provide the missing image or the full reaction table showing:

  • LIST-I entries P,Q,R,SP,Q,R,SP,Q,R,S
  • LIST-II reagents 1,2,3,4,51,2,3,4,51,2,3,4,5
  • the structure of XXX

Then I can solve it step-by-step and verify the stored answer.

Comparison with stored answer

Since the essential reaction data are missing, I cannot independently derive whether option DDD is correct.

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