An intriguing stereoselective visible-light photocatalysis of dihydroquinoxalinone derivatives has been realized via cyclization with or without the solvolysis cascade. The reactions provided the polycyclic ring structures with efficient formation of multiple bonds and with high stereoselectivity. X-ray crystallography unequivocally determined the structures of five polycyclic products

A series of iridoids, including iridomyrmecin A, B, C', D', (–)-isoiridomyrmecin, (+)-7-epi-boschnialactone, and the inside-yohimbine analogs have been synthesized from the readily available, naturally occurring (–)-citronellal via the key step...