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Suitability of Diels Alder Reactants

Problem 1. Examine the following diene formulas ( A through G ) and select those that would not be a suitable diene component of a Diels-Alder reaction. Enter the letters corresponding to your selections in the answer box.
Do not enter superfluous characters, since they will be counted as incorrect answers.


Seven candidate dienes A-G for Diels-Alder: substituted 1,3-butadienes, fused-ring s-cis and s-trans dienes, a 1,4-diene, an alkene, and a conjugated enyne Which would not serve as Diels-Alder dienes?

Problem 2. Examine the following formulas ( V through Z ) and select those that are probably good dienophiles in the Diels-Alder reaction.
Enter the letters corresponding to your selections in the answer box.
Do not enter superfluous characters, since they will be counted as incorrect answers.


Five candidate dienophiles V-Z: tetramethylethylene, dimethyl acetylenedicarboxylate, acrylonitrile, an N-methyl bicyclic amine, and benzene
Which are likely to function as good Diels-Alder dienophiles?




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