Addition of LiAlH4 to aldehydes to give primary alcohols

by James

Description: Addition of lithium aluminum hydride to aldehydes leads to formation of primary alcohols (after addition of acid) Content available for Reactionguide members only. Not a member? Get access for about 30 cents / day!

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Nes May 19, 2013 at 2:35 am

Hi,i have a question about the reduction of an aldehyd to a primary alcohol,in the class I learned that it can be done either with adding NaBH4+etoh(weak acid) or with LiAlH4 and than we have to add et2o and not an acid????

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james May 23, 2013 at 4:45 pm

Reduction of aldehydes can be performed with NaBH4 or LiAlH4. If ether is mentioned, it acts as a solvent only. The second step is addition of some kind of proton source to give the neutral alcohol. This is sometimes written as H3O+ or NH4Cl.

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