Reaction of Salicylalkylenediimines with 2-Chloro-4,5-diphenyl-1,3,2-dioxaphospholene

摘要

Reaction of salicyl(cyclo)alkylenediimine Ia-Ic with 4,5-diphenyl-2-chloro-1,3,2-dioxaphospholene II was found to occur as a cascade cyclization giving rise to tetracyclic derivatives Illa-IIIc of the hexa-coordinated phosphorus atom of the salt structure involving intramolecular transannular N->P bond.