Concept explainers
(a)
Interpretation:
The synthesis of the given
Concept introduction:
Wittig reactions generate the carbon double(
Answer to Problem 17.56P
The synthesis of the given alkene from an alkyl halide and a ketone or aldehyde is shown below:
Explanation of Solution
The given structure of alkene is
In the above structure, the
By undoing a Wittig reaction in retrosynthetic analysis,
In the forward direction, the synthesis of the given alkene from an alkyl halide and benzaldehydewould appears as follows:
The synthesis of given alkene from an alkyl halide and a ketone or aldehyde is shown.
(b)
Interpretation:
The synthesis of the given alkene from an alkyl halide and a ketone or aldehyde is to be shown.
Concept introduction:
Wittig reactions generate the carbon double(
Answer to Problem 17.56P
The synthesis of the givenunsymmetricalkene from an alkyl halide and a ketone or aldehyde by two different ways as shown below.
Method 1:
Method 2:
Explanation of Solution
The given structure of alkene is
In the above structure, the
Method 1:
By undoing a Wittig reaction in retrosynthetic analysis,
In the forward direction, the synthesis of the given alkene from an alkyl halide and a ketone would appear as follows:
Method 2:
By undoing a Wittig reaction in retrosynthetic analysis,
In the forward direction, the synthesis of the given alkene from an alkyl halide and an aldehyde would appear as follows:
The synthesis of the givenunsymmetricalkene from an alkyl halide and a ketone or an aldehyde by two different ways is shown.
(c)
Interpretation:
The synthesis of the given alkene from an alkyl halide and a ketone or aldehyde is to be shown.
Concept introduction:
Wittig reactions generate the carbon double(
Answer to Problem 17.56P
The synthesis of the givenunsymmetricalkene from an alkyl halide and a ketone or aldehyde by two different ways as shown below.
Method 1:
Method 2:
Explanation of Solution
The given structure of alkene is
In the above structure, the
Method 1:
By undoing a Wittig reaction in retrosynthetic analysis,
In the forward direction, the synthesis of the given alkene from an alkyl halide and benzaldehyde would appear as follows:
Method 2:
By undoing a Wittig reaction in retrosynthetic analysis,
In the forward direction, the synthesis of the given alkene from an alkyl halide and a ketone would appear as follows:
The synthesis of the given unsymmetric alkene from an alkyl halide and a ketone or an aldehyde by two different ways is shown.
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Chapter 17 Solutions
Organic Chemistry: Principles and Mechanisms (Second Edition)
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