Carboxylic Acids and their Derivatives - Result Question 71
####57. Write down the reactions involved in the preparation of the following using the reagents indicated against in parenthesis.
“Propionic anhydride from propionaldehyde”
$$ \left[AgNO _3, NH _4 OH, P _2 O _5\right] $$
$(1984,2 M)$
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Solution:
- $CH _3 CH _2 CHO+AgNO _3 \xrightarrow{NH _4 OH} CH _3 CH _2 COOH$
$$ \xrightarrow[\Delta]{P _2 O _5}\left(CH _3 CH _2 CO\right) _2 O $$
