Grignard Reagent Acceleration of the Intramolecular Diels-Alder Reaction of Furans with Unactivated Alkynes: Towards Structurally Complex Oxabicyclic Alkenes
作者:Yifeng Chen、Lu Wang、Yuanhong Liu、Yuxue Li
DOI:10.1002/chem.201102028
日期:2011.11.4
to accelerate: A cascade reaction of ortho‐(alkynyl)phenyl furanyl ketones with Grignard reagents, involving an interesting intramolecular Diels–Alder reaction of furans with unactivated alkynes, is described (see scheme). DFT calculations and experimental results suggest that the formation of a chelated magnesium alkoxide plays an important role in accelerating the reaction rate and determining the