Which of the following compound on treatment with conc. aqueous alkali and on further acidification gives the following lactone?

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Solution

The correct option is C

Step 1 is the intramolecular Cannizzaro reaction where a non-enolizable aldehyde disproportionates to a carboxylic acid and a primary alcohol under the influence of an alkali.

Step 2 is the intramolecular esterification to furnish a lactone.

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Similar questions

Q. Which of the following reactants on reaction with conc.

N a O H

followed by acidification gives following lactone as the main product?

Q. Which of the following reactants on reaction with conc. NaOH followed by acidification gives following lactone as the main product?

Given compound (A) upon treatment with

K M n O_{4} / H^{+}

gives (B), which on heating with ammonia produces (C). (C) on treatment with

B r_{2} / N a O H

produces (D). Strongly heating (C) produces (E) which on further reatment with ethyl 2-bromoacetate in the presence of

K O H

followed by acidification gives (F).

(F) from the following is:

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Cyclohexene on reductive ozonolysis gives compound B. Compound 'B' on further treatment with aqueous NaOH followed by heating yields compound 'C'. The compound 'C' is:

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Which of the following compound on treatment with conc. aqueous alkali and on further acidification gives the following lactone?

The correct option is C Step 1 is the intramolecular Cannizzaro reaction where a non-enolizable aldehyde disproportionates to a carboxylic acid and a primary alcohol under the influence of an alkali. Step 2 is the intramolecular esterification to furnish a lactone.

The correct option is C

Step 1 is the intramolecular Cannizzaro reaction where a non-enolizable aldehyde disproportionates to a carboxylic acid and a primary alcohol under the influence of an alkali.

Step 2 is the intramolecular esterification to furnish a lactone.