Essential Organic Chemistry (3rd Edition)
Essential Organic Chemistry (3rd Edition)
3rd Edition
ISBN: 9780321937711
Author: Paula Yurkanis Bruice
Publisher: PEARSON
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Chapter 12.9, Problem 24P

(a)

Interpretation Introduction

Interpretation: The products for the given reaction have to be found.

Concept Introduction:

Ketals:

Ketals are used to protect the carbonyl group of the ketone.

In the following example, the carbonyl group of the acetone has been protected as ketal by using ethylene glycol.

Example:

  Essential Organic Chemistry (3rd Edition), Chapter 12.9, Problem 24P , additional homework tip  1

In acidic condition, a ketone reacts with two molecules of alcohol or a molecule of diol to form ketal or cyclic ketal respectively.

General scheme:

  Essential Organic Chemistry (3rd Edition), Chapter 12.9, Problem 24P , additional homework tip  2

(b)

Interpretation Introduction

Interpretation: The products for the given reaction have to be found.

Concept Introduction:

Acetals:

Acetals are used to protect the carbonyl group of the aldehyde.

In the following example, the carbonyl group of the acetaldehyde has been protected as acetal by using ethylene glycol.

  Essential Organic Chemistry (3rd Edition), Chapter 12.9, Problem 24P , additional homework tip  3

In acidic condition, an aldehyde reacts with two molecules of alcohol or a molecule of diol to form acetal or cyclic acetal respectively.

General scheme:

  Essential Organic Chemistry (3rd Edition), Chapter 12.9, Problem 24P , additional homework tip  4

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Assign R or S to all the chiral centers in each compound drawn below porat bg 9 Br Br
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