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
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統計: A(7), B(31), C(3), D(9), E(0) #937578
統計: A(7), B(31), C(3), D(9), E(0) #937578
詳解 (共 3 筆)
#1154675
標準答案修正為 B
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