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Theoretical calculations of the Michael addition of diethylamine, pyrrolidine, and benzylamine to DMAD at the DFT (B3LYP/6-31+G ∗ ) level indicate that the reaction follows a stepwise mechanism via a zwitterionic intermediate. The reactions have low activation barriers, 13–15kcalmol −1 and are exothermic, ΔH°=−29 to −44kcalmol −1 . The detailed investigation of the reaction...
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