問題詳情

33.

Which of the following best describes a key step in the mechanism for the reaction above?
(A) Nucleophilic attack by a resonance-stabilized carbanion at a carbonyl carbon
(B) Electrophilic attack by a Lewis acid at a carbonyl carbon
(C) Free radical substitution at a carbonyl carbon
(D) Carbene insertion at a carbonyl carbon
(E) Nucleophilic aromatic substitution

參考答案

答案：A

統計：A:0,B:0,C:0,D:0,E:0

難度：計算中