Organic Chemistry
Organic Chemistry
2nd Edition
ISBN: 9781118452288
Author: David R. Klein
Publisher: WILEY
Question
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Chapter 18.6, Problem 20PTS

(a)

Interpretation Introduction

Interpretation: For the given transformations, efficient synthesis should be proposed.

Concept introduction:

  • When approaching a synthesis problem two questions should be asked
    1. 1.  Is there a change in the carbon skeleton?
    2. 2. Is there a change in the position or identity of the functional group
  • When approaching a synthesis problem, should not encounter a one-step method
  • The desired transformation can achieve in two steps
  • There are two ways to introduce functionality at a benzylic position
    1. 1. Oxidation, which produces benzoic acid at benzylic position
    2. 2. Radical bromination, which produces benzylic halide.

(b)

Interpretation Introduction

Interpretation: For the given transformations, efficient synthesis should be proposed.

Concept introduction:

  • When approaching a synthesis problem two questions should be asked
    1. 3.  Is there a change in the carbon skeleton?
    2. 4. Is there a change in the position or identity of the functional group
  • When approaching a synthesis problem, should not encounter a one-step method
  • The desired transformation can achieve in two steps
  • There are two ways to introduce functionality at a benzylic position
    1. 3. Oxidation, which produces benzoic acid at benzylic position
    2. 4. Radical bromination, which produces benzylic halide.

(c)

Interpretation Introduction

Interpretation: For the given transformations, efficient synthesis should be proposed.

Concept introduction:

  • When approaching a synthesis problem two questions should be asked
    1. 5.  Is there a change in the carbon skeleton?
    2. 6. Is there a change in the position or identity of the functional group
  • When approaching a synthesis problem, should not encounter a one-step method
  • The desired transformation can achieve in two steps
  • There are two ways to introduce functionality at a benzylic position
    1. 5. Oxidation, which produces benzoic acid at benzylic position
    2. 6. Radical bromination, which produces benzylic halide.

(d)

Interpretation Introduction

Interpretation: For the given transformations, efficient synthesis should be proposed.

Concept introduction:

  • When approaching a synthesis problem two questions should be asked
    1. 7.  Is there a change in the carbon skeleton?
    2. 8. Is there a change in the position or identity of the functional group
  • When approaching a synthesis problem, should not encounter a one-step method
  • The desired transformation can achieve in two steps
  • There are two ways to introduce functionality at a benzylic position
    1. 7. Oxidation, which produces benzoic acid at benzylic position
    2. 8. Radical bromination, which produces benzylic halide.

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Students have asked these similar questions
Q1: a) Arrange the compounds in order of decreasing pKa, highest first. ОН ΟΗ ῸΗ дон ОН ОН CI Br
(4 pts - 2 pts each part) A route that can be taken to prepare a hydrophobic (water-repellent) aerogel is to start with trichloromethylsilane, CH3SiCl3 as the silicon source. a. What is the chemical reaction that this undergoes to form a product with Si-OH groups? Write as complete of a chemical equation as you can. CI CI-SI-CH3 CI b. The formation of a byproduct is what drives this reaction - what is the byproduct (if you didn't already answer it in part (a)) and how/why does it form?
b) Circle the substrate that would not efficiently generate a Grignard reagent upon reaction with Mg in ether. CI Br ד c) Circle the Grignard reagents that contain incompatible functional groups. MgBr HO MgBr MgBr MgBr MgBr HO MgBr
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