The regioselective addition-elimination of 3-acetyl-4-methoxy-2-butenolide and 3-(1-methoxy ethylidene)furan-2,4-dione having enol ether with different amines yielded novel stable enaminone derivatives in ethanol solution. Their structures were elucidated by 1 H NMR, 13 C NMR, HRMS and X-ray diffraction data. Among of them, the Z/E isomers were observed for 3-(1-aminoethylidene)-furan-2,4-dione. The structures of byproducts for preparing intermediates and title compounds were also characterized.