Chapter 20, Problem 55PP

Interpretation Introduction

Interpretation:

The given starting molecule and reagents used to accomplish the target products transformation should be draw and identified.

Concept introduction:

Elimination Reaction: It is just reverse reaction of addition where substituent from the given molecule is removed via E1 (the reaction depends only on the substrate involved in the reaction) or E2 (the reaction depends on both of the substituents in the reaction) mechanism.

$S_{N}1$Reaction: The $S_{N}1$ reaction is twostep process, leaving group leaves the molecule is first step and forms the more stable carbocation. Further, nucleophile attacks the carbocation and forms the final product in the second step. The rate of the reaction depends on the stability of the carbocation.

$S_{N}2$Reaction: The $S_{N}2$ reaction is single step process, leaving group leaves the molecule and nucleophiles attack the molecule is single step process which is simultaneous process.

Grignard Reaction: This is a organometallic reaction in different alkyl, aryl-magnesium halides add to a carbonyl group in an aldehyde and ketone. This reaction is an important for the conversion of carbon-carbon single $\left(-C-C-\right)$ bond. Moreover the addition of a reagent to an aster, lactone gives a tertiary alcohol in which will alkyl groups are the same and the addition of a Grignard reagent to a nitrile produces an unsymmetrical ketone.

Hydrolysis Reaction: This type of reaction involving the braking of a carbon-carbon triple, double bonds in a molecules using water.

To identify: The synthetic route to accomplish the given transformation.