Carboxylic acids and esters are reduced to alcohols with lithium aluminum hydride. Milder reducers such as sodium borohydride are unable to reduce these compounds.

 
sintesis-alcoholes-reduccion-acidos
 
Ethanoic acid [1] is transformed by reduction with lithium aluminum hydride in ethanol [2].
 
sintesis-alcoholes-reduccion-esteres
Methyl benzoate [1] is converted to benzyl alcohol [2] by reduction with lithium aluminum hydride.

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