Novel hexahydrofuro[3,4‐<i>b</i>]‐2(1<i>H</i>)‐pyridones from 4‐aryl substituted 5‐alkoxycarbonyl‐6‐methyl‐3,4‐dihydropyridones

Abstract

Abstract The title compounds 6 have been prepared in a one‐step procedure from the corresponding 4‐aryl substituted 5‐alkoxycarbonyl‐6‐methyl‐3,4‐dihydropyridones 4 in good yields. Quantum chemical calculations reveal a non‐planar molecule with a distorted dihydropyridone ring and two favoured conformations. The 13C nmr data and theoretical calculations support a strong push‐pull effect on the olefinic moiety.