Phenyl phosphorus dichloride → O-(2,6-Di-tert-butyl-4-methylphenyl) phenylphosphonochloridite

Participants

Reaction Steps

To a solution of 110 grams of 2,6-di-tert-butyl-p-cresol in 252 grams of triethylamine was added at 25°-26° C. over a 15-minute period 89.5 grams of dichlorophenylphosphine. The reaction mixture was heated for 31 hours at 95°-97° C. The excess triethylamine solvent was then removed by distillation under vacuum, the resulting residue was triturated with 200 ml of dry benzene, and the white crystalline solid triethylamine hydrochloride was separated by filtration. The desired product named above was isolated from the filtrate by distillation of the benzene under vacuum and crystallization of the residue from acetonitrile. The product was obtained as white crystals melting at 103°-106° C.

Provenance & Evidence