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Abstract
We have found that α-pinene and β-pinene react with diethyl hydrogen phosphite (DEHP) and di-tert-butyl peroxide (TOOT) to form both mono- and diphosphonates. When the reaction was catalyzed by TOOT at 140-150[ddot]C, the major products were diphosphonates. Under comparatively mild initiation by benzoyl. peroxide at 80[ddot]C monophosphonate adducts were the major products.