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Abstract
The reaction of 3,5-di-tert-butyl-4-hydroxybenzenesulfenyl chloride, 1, with the trialkyl phosphites 5a–d gave the corresponding S-(3,5-di-tert-butyl-4-hydroxyphenyl)-O,O-dialkyl phosphorothiolates 6a–d. The formation of 6a–d constitutes chemical evidence for the intermediacy of 1 which was previously inferred from spectroscopic evidence.