Select the reagents needed to effect the transformation from the carboxylic acid to the aldehyde. draw the structure of the intermediate.

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Chemistry

Marlene Small

23 December, 06:39

Select the reagents needed to effect the transformation from the carboxylic acid to the aldehyde. draw the structure of the intermediate.

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Donte Oconnor · Answer 1

Carboxylic Acids can be converted into the Aldehydes in following two steps,

1) Converting Carboxylic Acid into Acyl Halide;

Carboxylic is first reacted with Thionyl chloride in order to replace a weak leaving group (-OH) with a good leaving group i. e. - Cl.

2) Converting Acyl Halide into Aldehyde;

The Acyl Halide formed in first step is treated with Lithium tri tert - butoxy aluminum hydride, which acts as a source of Hydride and prevent further resuction of Aldehyde into Alcohols.

Reactions are as follow,