試題詳解

37. Which sequence of steps below describes the best synthesis of 5-oxohexanoic acid starting with 1-methylcyclopentan-1-ol?
(A) 1. Conc. KMnO₄; 2. Dry gaseous HBr; 3. Mg/ether; 4. CO₂
(B) 1. H₂SO₄ and heat; 2. Conc. KMnO₄
(C) 1. Conc. KMnO₄; 2. CH₃MgBr/ ether; 3. H₃O⁺
(D) 1. H₂SO₄ and heat; 2. O₃; 3. (CH₃) ₂S; 4. PCC
(E) 1. H₂SO₄ and heat; 2. Conc. KMnO₄; 3. LiAlH₄; ₄. H₃O⁺