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Multiple Choice
Predict the product of the reaction
A
B
C
D
Verified step by step guidance
1
Identify the starting material as a carboxylic acid, which is characterized by the presence of a carboxyl group (COOH).
The first reagent, NaBH4, is a reducing agent that typically reduces aldehydes and ketones to alcohols. However, it is not strong enough to reduce carboxylic acids, so no reaction occurs in this step.
The second reagent, KMnO4, is a strong oxidizing agent. However, since the starting material is already a carboxylic acid, further oxidation is not possible, so no change occurs in this step.
The third step involves the use of a Grignard reagent, CH3CH2MgBr, which reacts with carbonyl compounds to form alcohols. Since the carboxylic acid was not reduced in the first step, the Grignard reagent will not react with it directly.
The final step involves PCC, which is an oxidizing agent used to convert primary alcohols to aldehydes and secondary alcohols to ketones. Since no alcohol was formed in the previous steps, PCC will not have a substrate to oxidize, resulting in no change.