CUET Preparation Today
CUET
Chemistry
Organic: Alcohols, Phenols and Ethers
What will the product of the given reaction?
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The correct answer is option 1. Sodium borohydride (NaBH4) is a convenient source of hydride ion (H−) for the reduction of aldehydes and ketones. Ketones are reduced to secondary alcohols. As a source of hydride ion, NaBH4 will also act as a strong base, deprotonating water, alcohols, and carboxylic acids. The reduction of ketones results in the formation of secondary alcohols. A C−H bond is formed and a C–O (pi) bond is broken. The mechanism for these reductions follows the very common two-step addition-protonation pattern often found in reactions of aldehydes and ketones. The first step in this reaction is nucleophilic addition to the carbonyl carbon forming a C-H bond and breaking a C–O (pi) bond. |