Compound (X) undergoes following sequence of reactions to give the Lactone (Y). Compound (X) (i) HCHO, KOH (ii) KCN(alc) (iii) H3OH+ CH3 H3C H OH O O Lactone (Y). (A) HOH2C–C–CHO CH3 CH3 (B) H2C–CH2–C

Question

Compound (X) undergoes following sequence of reactions to give the Lactone (Y). Compound (X) (i) HCHO, KOH (ii) KCN(alc) (iii) H3OH+ CH3 H3C H OH O O Lactone (Y).

(A) HOH2C–C–CHO CH3 CH3
(B) H2C–CH2–CHO CH3
(C) H–C–CHO CH3 CH3
(D) H2C–CH2–CH2–CH2–CHO CH3

Prashant Kotian · Accepted Answer

Correct answer: C. Me Me CH=O OH, CH2O  Me Me CH=O CH2OH CN  Me Me CH—CN CH2OH O– H3O Me Me CH2OH OH COOH esterification O Me Me O OH

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