研究所、轉學考(插大)◆綜合化學題庫下載題庫

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