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A new, general method for the synthesis of phosphono-γ-butyrolactones has been achieved through Mn(OAc)3-mediated radical oxidative phosphonation and lactonization of alkenoic acids with H-phosphonates and H-phosphine oxide. Mn(OAc)3 can be readily prepared from Mn(OAc)2 in the laboratory. This transformation allows the direct formation of a P-C bond and the construction of a lactone ring in one reaction.
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Gao et al. (2014) studied this question.
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