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Abstract
Phosphonochloridous and phosphonous esters were prepared from the reaction of phenylphosphonous dichloride with 2,4-di-tert-butylphenol, 2,6-di-tert-butyl-4-methylphenol, and 2,4,6-tri-tert-butylphenol. Various synthetic methodologies, including phase-transfer catalysis, are described and compared. Phosphonous diesters containing two different substituted-phenyl moieties were prepared from phosphonochloridous monoesters. The reaction of O-(2,6-di-tert-butyl-4-methylphenyl)-phenylphosphonochloridite with N-methyldiethanolamine, n-octyl mercaptan, and water was studied and found to give a bisphosphonite, phosphonothioite, and phosphinate, respectively.