What two enamines are formed when 2 -methylcyclohexanone is treated with (CH 3 ) 2 NH?

Name: Problem 22, Chapter 18: Organic Chemistry
Uploaded: 2022-11-02T21:43:02-08:00
Channel: Kaden Bunch
Description: What two enamines are formed when 2 -methylcyclohexanone is treated with (CH 3 ) 2 NH?

step 1 All right, so here we're going to look at the two enamines that can form. And remember, an imene

What two enamines are formed when 2 -methylcyclohexanone is...

Key Concepts

Enamine Formation

Enamine formation involves the reaction of a carbonyl compound with a secondary amine to yield an enamine via nucleophilic addition followed by the elimination of water. This process generates a compound featuring a carbon–carbon double bond conjugated with an amine, making it a nucleophilic intermediate used in various organic synthesis reactions.

Iminium Ion Intermediate

The mechanism begins with the formation of an iminium ion. The secondary amine attacks the electrophilic carbonyl carbon, forming a tetrahedral intermediate that, after a series of proton transfers and elimination of water, yields an iminium ion. This intermediate is crucial because its deprotonation leads directly to the formation of the enamine.

Regiochemistry in Enamine Formation

During enamine formation, the removal of a proton from one of the ?-carbons to the nitrogen can occur at different sites, which affects the position of the resulting double bond. This regiochemical outcome is determined by the stability of the resulting enamine and the specific structural features of the starting carbonyl compound.

Stereochemistry and Isomer Formation

When forming enamines, the creation of a new carbon–carbon double bond introduces the possibility of geometric (E/Z) isomers. The stereochemistry of the enamine can influence its reactivity and properties, and different isomers may form depending on the steric and electronic factors present in the reaction.

Transcript

Please give Ace some feedback