Lanthanide Bis-trifluoromethanesulfonylamides as a New Type of Asymmetric Catalysts for Hetero Diels-Alder Reaction with Danishefsky’s Diene in the Presence of Water

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Abstract
The asymmetric catalysis of hetero Diels-Alder reaction with Danishefsky’s diene by chiral lanthanide bis-trifluoromethanesulfonylamide (bis-trifylamide) complexes, particularly yttrium bis-trifylamide is described, wherein the significant effect of water as an additive is observed in increasing not only the enantioselectivity but also the chemical yield.