Q22-5P
Question
Show how you might prepare 1-penten-3-one from 3-pentanone.
Step-by-Step Solution
Verified Answer
1Step 1: Sunthesis of 1-Penten-3-one
The compound 3-pentanone undergoes α-bromination with acetic acid and forms α-bromo ketone. Then the α-bromo ketone undergoes dehydration by pyridine and gives 1-penten-3-one.
2Step 2: Explanation of α-bromination
Reaction of halogen (such as bromine) in acetic acid with aldehyde and ketone is called α-bromination because in this reaction the α-hydrogen gets eliminate and the bromine takes its place.
3Step 3: Mechanism of the reaction
The mechanism of preparation of 1-Penten-3-one from 3-pentanone is
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