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  4. The reduction product of ethyl-3-oxobutanoate by NaBH 4 in methanol is

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Q. The reduction product of ethyl-$3$-oxobutanoate by $NaBH _{4}$ in methanol is

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Solution:

$NaBH _{4}$ is most selective reducing agent which only reacts with aldehydes or ketones due to its milder nature.
So, keto group of Ethyl-$3$ -oxobutanoate reduce only not ester group.
The reaction is as follows:
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