試題詳解

49. Which of the following synthetic procedures would be employed most effectively to transform ethanol into ethyl propyl ether?
(A) 1. Ethanol, HBr 2. Mg, ether, then H₃O 3. NaH, then CH₃CH₂Br
(B) 1. Ethanol, HBr 2. Mg, ether, then HCHO, then H₃O 3. NaH, then CH₃CH₂Br
(C) 1. Ethanol 2. CH₃CH₂CH₂OH 3. H₂SO₄, 140 °C
(D) 1. Ethanol, NaH 2. HCHO, then H₃O 3. HBr, then Mg, ether, then CH₃CH₂CH₂Br
(E) 1. Ethanol 2. H₂SO₄, 180 °C 3. CH₃CH₂CH₂Br