sters can be cleaved in acidic conditions (hydrolysis) or in basic conditions (saponification), but Esters can only be made in acidic conditions (Fischer Esterification). Explain why esters cannot be formed in basic conditions. Use the structures provided below for your answer Hint: Use Pka to think about the concept. Which one is higher pKa?
Catalysis and Enzymatic Reactions
Catalysis is the kind of chemical reaction in which the rate (speed) of a reaction is enhanced by the catalyst which is not consumed during the process of reaction and afterward it is removed when the catalyst is not used to make up the impurity in the product. The enzymatic reaction is the reaction that is catalyzed via enzymes.
Lock And Key Model
The lock-and-key model is used to describe the catalytic enzyme activity, based on the interaction between enzyme and substrate. This model considers the lock as an enzyme and the key as a substrate to explain this model. The concept of how a unique distinct key only can have the access to open a particular lock resembles how the specific substrate can only fit into the particular active site of the enzyme. This is significant in understanding the intermolecular interaction between proteins and plays a vital role in drug interaction.
Esters can be cleaved in acidic conditions (hydrolysis) or in basic conditions (saponification), but Esters can only be made in acidic conditions (Fischer Esterification). Explain why esters cannot be formed in basic conditions. Use the structures provided below for your answer
Hint: Use Pka to think about the concept. Which one is higher pKa?
![Hydrolysis
Saponification
1) NaOH
OCH3 H20
ОСН3 2) НCI
HO.
ОН
Fischer Esterification
Basic Esterification (not observed)
HOCH3
1) NaOCH3
*→
ОН
2) HCI
Ester is not formed
ОН
OCH3
H2SO4](/v2/_next/image?url=https%3A%2F%2Fcontent.bartleby.com%2Fqna-images%2Fquestion%2Fc0c45d2b-36a4-434b-baf3-673359555dba%2Ffe4c8a6e-a279-4c58-930e-57899c9a717c%2Fg6dpq1_processed.png&w=3840&q=75)
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