Multiple choice

Which of the following acts as a nucleophilic catalyst in organic reactions?

  1. Dimethyl malonate

  2. Diethyl malonate

  3. 4-Dimethylaminopyridine

  4. Dimethyldioxirane
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C Correct answer
Explanation

4-Dimethylaminopyridine is a derivative of pyridine. This colourless solid is a useful nucleophilic catalyst for a variety of reactions such as esterifications with anhydrides, the Baylis-Hillman reaction, hydrosilylations, tritylation, the Steglich rearrangement, Staudinger synthesis of β-lactams and many more. vv

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