Shown below is an example of another Diels-Alder reaction performed by James H. Cooley and Richard Vaughan Williams (J. Chem. Educ. 1997, 74, 5, 582) which results in two products. Although in this article the reaction shows relatively low selectivity between the between the thermodynamic and kinetic products, a recent publication by other authors show that this reaction can be performed in 10 minutes with the help of microwaves (yes, microwaves!) with great selectivity. Point out the kinetic and thermodynamic products. Explain your choices with the help of an energy profile diagram. Draw the transition state structure for each product. (Hint: The recent article cites Cooley and Williams work as a reference) 3. N-Ph N-Ph

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