Fig. 6: Total synthesis of 4-epi-phyllanthine (4) via hydrogen atom transfer (HAT)-based C2-epimerization of the neosecurinine scaffold.

a Ellman’s light-mediated piperidine epimerization (ref. 41); b Light-mediated C2-epimerization of 30 enables the synthesis of 4-epi-phyllanthine (4). ET electron transfer, HAT hydrogen atom transfer.