Organic Chemistry
Organic Chemistry
12th Edition
ISBN: 9781118875766
Author: T. W. Graham Solomons, Craig B. Fryhle, Scott A. Snyder
Publisher: WILEY
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Chapter 19, Problem 59P
Interpretation Introduction

Interpretation:

For each of the following, the products A and B are to be identified.

Concept introduction:

Electrophiles are electron deficient species that have positive or partially positive charge. Lewis acids are electrophiles that accept electron pair.

Nucleophiles are electron rich species that have negative or partially negative charge. Lewis bases are nucleophiles that donate electron pair.

Free radical is an atom, molecule, or ion that has an unpaired electron, which makes it highly chemically reactive.

Substitution reaction: A reaction in which one of the hydrogen atoms of a hydrocarbon or a functional group is substituted by any other functional group is called substitution reaction.

Elimination reaction: A reaction in which two substituent groups are detached and a double bond is formed is called elimination reaction.

Addition reaction: It is the reaction in which unsaturated bonds are converted to saturated molecules by the addition of molecules.

The condensation reactions in carbonyl, the enolate or enol of a carbonyl group of one compound reacts with the carbonyl group of another compound. The two main types of condensation are Claisen and aldol condensation.

Claisen condensation is the formation of Organic Chemistry, Chapter 19, Problem 59P , additional homework tip  1 keto esters through carbon-carbon bond formation.

The Claisen condensation is the carbon–carbon bond formation reaction and is important for the preparation of βKeto ester.

In Claisen condensation, the ester of one molecule is added to the carbonyl carbon of another molecule and the formation of βKeto ester takes place.

When one ester molecule has no alpha hydrogen, crossed Claisen condensation occurs.

Aldol condensation involves the reaction of the enolate of an aldehyde or ketone with the carbonyl carbon of another molecule under basic condition, forming Organic Chemistry, Chapter 19, Problem 59P , additional homework tip  2 hydroxyl ketone or aldehyde.

An aldol reaction takes place by acid catalysis, and direct dehydration of β hydroxy aldol intermediate forms α,β unsaturated product.

A chemical reaction that is catalyzed by an acid is called acid catalyzed reaction.

A chemical reaction that is catalyzed by an base is called base catalyzed reaction.

Aldol reaction is preferred in basic condition over acidic condition as after the aldol condensation, acid catalysis promotes the reaction further.

A carbon–carbon bond formation occurs through aldol condensation reaction.

An aldol reaction takes place in a protic solvent with a base.

Dehydration of aldol addition product leads to the formation of conjugated α,β unsaturated carbonyl compound and the overall reaction is aldol condensation.

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Provide concise syntheses for each of the following compounds starting from but-1 - ene. The source of all the carbon atoms in these molecules must be either but-1 - ene or any one carbon nucleophile/electrophile. (If you must use a reagent that has more than one carbon atoms you must show the preparation of that reagent from but-1 - ene.) (a) Methyl propanoate (b) 3, 5- Dimethylheptan-4-one (c) 5-ethyl-7-methylnon-4-ene
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Chapter 19 Solutions

Organic Chemistry

Ch. 19 - Practice Problem 19.11 Outlined below is a...Ch. 19 - Prob. 12PPCh. 19 - Prob. 13PPCh. 19 - Prob. 14PPCh. 19 - Practice Problem 19.15 Starting with ketones and...Ch. 19 - Practice Problem 19.16 Assuming that dehydration...Ch. 19 - Practice Problem 19.17 What starting compound...Ch. 19 - Practice Problem 19.18 What experimental...Ch. 19 - Prob. 19PPCh. 19 - Practice Problem 19.20 When acrolein (propenal)...Ch. 19 - Prob. 21PPCh. 19 - PRACTICE PROBLEM 19.22 Qutline reasonable...Ch. 19 - Prob. 23PCh. 19 - Show all steps in the following syntheses. You may...Ch. 19 - Prob. 25PCh. 19 - Prob. 26PCh. 19 - Prob. 27PCh. 19 - 19.28 Show how the diketone at the right could be...Ch. 19 - Prob. 29PCh. 19 - 19.30 Write a detailed mechanism for the following...Ch. 19 - Prob. 31PCh. 19 - Prob. 32PCh. 19 - 19.33 Predict the products from each of the...Ch. 19 - Prob. 34PCh. 19 - Show how each of the following transformations...Ch. 19 - Prob. 36PCh. 19 - What reagents would you use to bring about each...Ch. 19 - Prob. 38PCh. 19 - Prob. 39PCh. 19 - 19.40 When the aldol reaction of acetaldehyde is...Ch. 19 - Prob. 41PCh. 19 - Prob. 42PCh. 19 - 19.43 The following reaction illustrates the...Ch. 19 - What is the structure of the cyclic compound that...Ch. 19 - Prob. 45PCh. 19 - Prob. 46PCh. 19 - Prob. 47PCh. 19 - Predict the products from the following reactions....Ch. 19 - Prob. 49PCh. 19 - Prob. 50PCh. 19 - Prob. 51PCh. 19 - Prob. 52PCh. 19 - Prob. 53PCh. 19 - The Perkin condensation is an aldol-type...Ch. 19 - 19.55 (a) Infrared spectroscopy provides an easy...Ch. 19 - Allowing acetone to react with 2 molar equivalents...Ch. 19 - (+) Fenchone is a terpenoid that can be isolated...Ch. 19 - Prob. 58PCh. 19 - Prob. 59PCh. 19 - 19.60 Develop a synthesis for the following...Ch. 19 - 19.61 Provide a mechanism for each of the...Ch. 19 - 19.62 (a) Deduce the structure of product A,...Ch. 19 - Prob. 63PCh. 19 - Prob. 1LGP
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