Abstract: Bis (pyrid0dipyrimidines)(bis-PP's) as redox catalysts, in which two pyridodipyrimidine moieties are linked with polymethylene chains, have been synthesized by the condensation of bis (6-chloro-5-formyluracil-3-yl) alkanes with 6-alkylaminouracils. These bis-PP's oxidized alcohols more efficiently than monomeric pyridodipyrimidines to give the corresponding carbonyl compounds. Particularly, bis (7-methyl-1 O-(n-octyl) ...