Synthetic Photochemistry. A Synthesis of the Carbon Skeleton found in Taylorine from Mylia taylorii, using the Di-?-methane Rearrangement

Article abstract of DOI:10.1039/P19810001046

Synthetic routes to the E- and Z-cyclopentenones (20) and (25), which incorporate photosensitive 1,4-diene systems, are described.Irradiation of the E-cyclopentenone (20) is shown to result in efficient regiospecific di-?-methane rearrangement (>70percent) to the vinylcyclopropane (26), which is then converted into trans-deoxytaylorione (28).Irradiation of the corresponding Z-cyclopentenone (25) also leads to (26), presumably by way of the E-cyclopentenone (20), produced by Z-E photoisomerisation.