An efficient route for the synthesis of phosphorus-selenium macro-heterocycles

Four-membered ring [PhP(Se)(μ-Se)] 2 (Woollins' reagent, WR) reacts with disodium alkenyl-diols followed by in situ ring-closure reaction with appropriate dibromoalkanes affording a series of unusual nine- to fifteen-membered organoselenophosphorus macrocycles bearing the O-P-Se-C n -Se-P-O or O-P-Se-C n -O-P-Se linkage. [PhP(Se)(μ-Se)]2 (Woollins' reagent, WR ) with disodium alkenyl-diols and dibromoalkanes are able to construct a series of unusual nine- to fifteen-membered organoselenophosphorus macrocycles bearing the O-P-Se-C n -Se-P-O linkage or the O-P-Se-C n -O-P-Se linkage.