Synthesis and Properties of Some Sulfur-Containing Derivatives of Phosphorylated Sterically Hindered Phenols

Resumo

The addition of thioacetic acid to 2,6-di-tert-butyl-4-(phosphorylmethylidene)cyclohexa-2,5-dien-1-ones has been accomplished for the first time. The resulting adduct is readily hydrolyzed with hydrazine hydrate to give 2,6-di-tert-butyl-4-[phosphoryl(sulfanyl)methyl]phenols, and the latter reacted with the initial quinomethanes, yielding 4,4′-[sulfanediylbis(phosphorylmethylene)]bis(2,6-di-tert-butylphenols).