Synthesis and Antioxidant Activity of Novel 15-Alkyl/aryl-13, 17-dihydro-15 lambda(5)-dibenzo [e, k] [1,3,7,10,2] dioxadiazaphosphacyclotridecin-15-selones/thiones/ones

A new class of phosphorus macrocycles were synthesized from 2-[(E)-2-2 [(hydroxymethyl) phenyl] imino ethylidene) amino] phenyl methanol 1 with various phenylphosphorodichloridates, phenyldichlorophosphine, and ethyldichlorophosphite in the presence of triethylamine at 0-10 degrees C under N-2 atmosphere in THF. All the title compounds were confirmed by analytical and spectral data (IR, H-1-, C-13-, P-31-NMR, and mass). The title compounds exhibited promising anti-oxidant activity.