Mesityl oxide is a common name of :
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- 3-Methyl cyclohexane carbaldehyde
- 4-Methyl pent-3-en-2-one
- 2,4-Dimethyl pentan-3-one
- 2-Methyl cyclohexanone
The Correct Option is B
Solution and Explanation
\(2\,CH_3COCH_3 \rightarrow (CH_3)_2C(OH)CH_2COCH_3\) (diacetone alcohol) \(\xrightarrow{-H_2O}\) \((CH_3)_2C=CH-CO-CH_3\).
Numbering the chain from the carbonyl end: \(C^1H_3-C^2O-C^3H=C^4(CH_3)-C^5H_3\), so the name is 4-methylpent-3-en-2-one.
Answer: (2) 4-Methyl pent-3-en-2-one
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