(A) In option $A$,the reaction of cyclohexylmagnesium bromide with acetone $(CH_3COCH_3)$ followed by acid hydrolysis $(H^+)$ yields $2-$cyclohexylpro

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Cyclohexylmagnesium bromide + Acetone $\xrightarrow[(2) H^+]{(1) CH_3COCH_3}$ $1-$cyclohexylpropan$-2-$ol

(A) In option $A$,the reaction of cyclohexylmagnesium bromide with acetone $(CH_3COCH_3)$ followed by acid hydrolysis $(H^+)$ yields $2-$cyclohexylpropan$-2-$ol,not $1-$cyclohexylpropan$-2-$ol. The Grignard reagent attacks the carbonyl carbon of acetone to form a tertiary alcohol. Therefore,the synthesis shown in option $A$ is incorrect.

Class 12 Chemistry Alcohols, Phenols and Ethers Properties of alcohol

Difficult

Point out the incorrect synthesis.

A
Cyclohexylmagnesium bromide + Acetone $\xrightarrow[(2) H^+]{(1) CH_3COCH_3}$ $1-$cyclohexylpropan$-2-$ol
B
$3-$bromopiperidine $\xrightarrow{Mg}$ $3-$magnesiumbromopiperidine $\xrightarrow{PhCHO, H^+}$ $1-$(phenylhydroxymethyl)piperidine
C
$PhMgBr + \text{Ethylene oxide} \xrightarrow[(2) H^+]{(1) \text{Ethylene oxide}} Ph-CH_2-CH_2-OH$
D
$PhMgBr \xrightarrow[(2) H^+]{(1) HCHO} Ph-CH_2-OH$