1,2-Dichloroethane → Triphenylphosphine Oxide

Participants

Reaction Conditions

Reaction Steps

81.7 mg. (0.164 mmol) of cobalt (saloph) pyridine nitro complex and 187 mg. (0.713 mmol) of triphenylphosphine were dissolved in 20 ml. of 1,2-dichloroethane together with 0.5 ml. of pyridine. (The saloph ligand is the tetradentate ligand [1,2-(ortho-OC6H4CH=N)2C6H4 ]2- obtained by condensation reaction of o-diaminobenzene with salicylaldehyde). The resulting solution was stirred under an oxygen atmosphere for 18 hours at 60° C. The resulting reaction product was analyzed by infrared spectroscopy showing a quantitative yield of triphenylphosphine oxide, i.e. 0.713 mmol. This example is illustrative of catalytic oxidation by a cobalt nitro complex having a tetradentate ligand and a monodentate basic ligand in accordance with this invention.

Provenance & Evidence