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Arylation and alkylation of 6H-dibenzo[c,e][1,2λ 5 ]oxaphosphinine 6-oxide at the phosphorus atom was accomplished. Tetrafluoro-4-pyridyl fragment was introduced via reaction of 6-trimethylsiloxy-6H-dibenzo[c,e][1,2]oxaphosphinine with pentafluoropyridine. The arylation of the title compound with aryl iodides containing both electron-acceptor and electron-donor substituents was effected under catalysis by palladium or nickel complexes.

Es sind Isomere von Typ (III) und (IV) bekannt, wobei es von der Art der Substituenten am Phosphoratom und am Stickstoff abhängt, welches Isomere sich bildet.