Bis-aluminated triflic amide promoted Diels–Alder reactions of α,β-unsaturated lactones
摘要:
The bis-aluminated triflic amides such as TfN[Al(Me)Cl](2) and TfN[Al(iBU)(2)](2,) which are derived from triffic amide (I mol) and aluminum reagent (2 mol), can efficiently promote the Diels-Alder reaction of alpha, beta-unsaturated lactone derivatives as dienophiles. Selection of the ligand on aluminum of these Lewis acids should be important depending on the combination of dienophile and 1,3-diene. (C) 2004 Elsevier Ltd. All rights reserved.