Benzofuran as a dienophile in Ï4s+Ï2s cycloaddition with cyclohexa-2,4-dienones. Studies on synthesis and photoreaction of dihydrobenzofuran annulated bicyclo[2.2.2]octenones
Keywords: Diels-Alder reaction; Cyclohexa-2,4-dienones; Oxa-di-Ï-methane rearrangement; 1,3-Acyl shift; Photochemistry;