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A series of pyrrolidine-urea bifunctional organocatalysts was efficiently synthesized and applied to the asymmetric Michael addition of ketone to nitroolefin. Theoretical study was performed to shed light on the origin of their different activities and revealed that the rigid structure formed between catalyst 1b with nitroolefin via double hydrogen bonding retarded the approach of nucleophilic enamine...
This article mainly focused on high level Density Functional Theory (DFT) studies on the chiral phosphoric acid-catalyzed Friedel–Crafts reactions between 4,7-dihydroindoles and nitroolefins. Firstly, the reactivities of 4,7-dihydroindole and indole in the chiral phosphoric acid-catalyzed Friedel–Crafts reactions with nitroolefin have been compared. The higher reactivity of 4,7-dihydroindole could...
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