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JEE Main levelSingle correct optionDifficulty 2 of 3co184

3-Oxobutanoic acid, , is gently warmed to about 100 C. The organic product is

  1. Abutan-2-one
  2. Bethanoic acid
  3. Cpropanone
  4. Dpropanoic acid

Answer: C

A beta-keto acid decarboxylates through a cyclic six-membered transition state giving an enol, which tautomerises to the ketone: .
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