Preparing Esters - ethyl 2-butenoate preparation from ethanol
Derive ethyl 2-butenoate from ethanol using following reagents
PCC , dil.NaOH , H2O2 , PCl3
Little tips to do the problem
Ethanol and PCC reaction
Alcohol reacts with PCC to give aldehydes. Therefore ethanol reacts with PCC to give ethanal.
Aldehydes and hydrogen peroxide reaction
Aldehydes are oxidized to carboxylic acid by hydrogen peroxide reaction.
Hydrogen peroxide is a mild oxidizing agent. Alkenes are not oxidized by hydrogen peroxide.
- ethyl but-2-enoate compound is an ester. Ester can be produced by adding ethanol to
relevant acid chlorides.
- Acid chlorides can be formed by carboxylic acids.
- carbon chain can be extended by aldol reaction. ( aldehydes and NaOH/KOH reaction ).
In this reaction number of carbon atoms are doubled