Determination of the structure of 3-acylmethylene-2,3-dihydrofurans with the aid of 2D NOESY spectra:: 1H and 13C NMR chemical shift assignment

The 2D NOESY method was used to determine the E/Z configuration and s-cis/s-trans conformation in a series of 3-acylmethylene-2,2,3-trisubstituted-2,3-dihydrofurans. The assignments of H-1 and C-13 NMR chemical shifts and J(C-13, H-1) coupling constants are presented. Copyright (C) 1999 John Wiley & Sons, Ltd.