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  4. Calcium butanoate on heating followed by treatment with 1, 2-ethanediol in the presence of catalytic amount of an acid, produces a major product which is

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Q. Calcium butanoate on heating followed by treatment with $1, 2$-ethanediol in the presence of catalytic amount of an acid, produces a major product which is

KVPYKVPY 2014

Solution:

Calcium butanoate on heating gives heptan-$4$-one, which on further reaction with $1, 2$-ethanediol in presence of catalytic amount of an acid produces cyclic ketal [product given in option (a)] as a major product.
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