Synthetic study toward tridachiapyrone B

Abstract A convergent approach to the skeleton of tridachiapyrone B is described taking advantage of the desymmetrization of α,α’-dimethoxy-γ-pyrone leading to α-crotyl-α’-methoxy-γ-pyrone in one step. To construct the quaternary carbon of the 2,5-cyclohexadienone of the target, a strategy based on the Robinson-type annulation of an aldehyde derived from α-crotyl-α’-methoxy-γ-pyrone was applied. The grafting of the simplified target’s side chain was demonstrated through an oxidative anionic oxy-Cope rearrangement of the tertiary alcohol arising from the 1,2-addition of a 1,3-dimethylallyl reagent to 2,5-cyclohexadienone connected to the α’-methoxy-γ-pyrone motif. Beilstein J. Org. Chem. 2022, 18, 1741–1748. doi:10.3762/bjoc.18.183
Source: Beilstein Journal of Organic Chemistry - Category: Chemistry Authors: Tags: α ’ -methoxy- γ -pyrone 2,5-cyclohexadienone oxy-Cope quaternary carbon Robinson-type annulation Full Research Paper Source Type: research