Organic Chemistry: Principles and Mechanisms (Second Edition)
Organic Chemistry: Principles and Mechanisms (Second Edition)
2nd Edition
ISBN: 9780393663556
Author: Joel Karty
Publisher: W. W. Norton & Company
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Chapter 11, Problem 11.40P
Interpretation Introduction

(a)

Interpretation:

The reaction and complete, detailed mechanism for the reaction is to be drawn.

Concept introduction:

Acid-catalyzed hydration of an alkyne produces a ketone. Step 1 is the electrophilic addition of H+, which gives a resonance-stabilized vinylic carbocation intermediate. In step 2, water behaves as a nucleophile, attacking the positively charged C of that intermediate. Deprotonation in Step 3 produces the uncharged OH group, which is attached to the alkene C. The product of it is an enol. Under acidic conditions, the enol rapidly tautomerizes to the more stable keto form.

Interpretation Introduction

(b)

Interpretation:

The reaction and complete, detailed mechanism for the reaction is to be drawn.

Concept introduction:

Acid-catalyzed hydration of an alkyne produces a ketone. Step 1 is the electrophilic addition of H+, which gives a resonance-stabilized vinylic carbocation intermediate. In step 2, water behaves as a nucleophile, attacking the positively charged C of that intermediate. Deprotonation in Step 3 produces the uncharged OH group, which is attached to the alkene C. The product of it is an enol. Under acidic conditions, the enol rapidly tautomerizes to the more stable keto form.

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Blocking Group are use to put 2 large sterically repulsive group ortho. Show the correct sequence toconnect the reagent to product with the highest yield possible. * see image **NOTE: The compound on the left is the starting point, and the compound on the right is the final product. Please show the steps in between to get from start to final, please. These are not two different compounds that need to be worked.
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Organic Chemistry: Principles and Mechanisms (Second Edition)

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