Arylation of 6H-dibenzo[c,e][1,2ℷ5]oxaphosphinine 6-oxide

Arylation and alkylation of 6H-dibenzo[c,e][1,2lambda(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.