Fig. 6

Post-pairing transformations of octahydroindolo[2,3-a]quinolizines. a OsO4-catalyzed dihydroxylation. b NBS-mediated synthesis of spiro-oxindole polycyclic systems. AcOH acetic acid, THF tetrahydrofuran
Post-pairing transformations of octahydroindolo[2,3-a]quinolizines. a OsO4-catalyzed dihydroxylation. b NBS-mediated synthesis of spiro-oxindole polycyclic systems. AcOH acetic acid, THF tetrahydrofuran