Which of the following is an incorrect method | vedclass

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(D) Let us analyze each reaction pathway for the synthesis of benzaldehyde:$A$. Etard reaction: Toluene is oxidized by $CrO_2Cl_2$ in $CS_2$ followed

Vedclass · Accepted Answer

$D$. Reaction of benzonitrile with $CH_3MgBr$ followed by hydrolysis

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(D) Let us analyze each reaction pathway for the synthesis of benzaldehyde:$A$. Etard reaction: Toluene is oxidized by $CrO_2Cl_2$ in $CS_2$ followed by hydrolysis to give benzaldehyde. This is a correct method.$B$. Rosenmund reduction: Benzoyl chloride is reduced by $H_2$ in the presence of $Pd-BaSO_4$ (Lindlar catalyst) to give benzaldehyde. This is a correct method.$C$. Toluene is oxidized by $CrO_3$ in the presence of acetic anhydride to form a gem-diacetate intermediate,which upon hydrolysis yields benzaldehyde. This is a correct method.$D$. Reaction of benzonitrile $(C_6H_5CN)$ with $CH_3MgBr$ (a Grignard reagent) followed by hydrolysis yields acetophenone $(C_6H_5COCH_3)$,not benzaldehyde. Therefore,this is an incorrect method for the synthesis of benzaldehyde.

Which of the following is an incorrect method for the synthesis of benzaldehyde?

Similar Questions

The intermediate compound $X$ in the following chemical reaction is :

The chemicals used for preparing acetophenone are:
$(A)$ $C_6H_6$
$(B)$ $CH_3COCH_3$
$(C)$ $CH_3COCl$
$(D)$ Anhydrous $AlCl_3$

Identify product $B$ in the following reaction:
Benzonitrile $\xrightarrow[\text{Dry ether}]{C_6H_5MgBr} A$ $\xrightarrow{H_3O^{+}} B$

Identify the product '$Y$' in the following reaction: $\text{Benzonitrile} \xrightarrow{C_6H_5MgBr/\text{dry ether}} X \xrightarrow{H_3O^+} Y + MgBr(OH) + NH_3$

What is the name of the given reaction?
$C_6H_6 + CO + HCl \xrightarrow{Anhyd. AlCl_3} C_6H_5CHO$

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