Question

Question: Which of the following compounds can serve as Michael acceptors?

Short answer

Answer

1. Yes
2. No
3. No
4. Yes

Step-by-step solution

Michael acceptor

A Michael acceptor is the $\mathit{\alpha }\mathbf{,}\mathit{\beta }$ unsaturated carbonyl compound. The general structure is shown below:

$\alpha ,\beta -$unsaturated carbonyl compound

Explanation

a.

The given compound is $\alpha ,\beta$-unsaturated. Thus, it is a Michael acceptor.

b.

The given compound is not $\alpha ,\beta$-unsaturated. Thus, it is not a Michael acceptor.

c.

The given compound is not $\alpha ,\beta$-unsaturated. Thus, it is not a Michael acceptor.

d.

The given compound is $\alpha ,\beta$-unsaturated. Thus, it is a Michael acceptor.