Direct regio- and diastereoselective diphosphonylation of cyclic enamines : one-pot synthesis of α,α′-bis(diphenylphosphoryl)- and α,α′-bis(diphenylphosphorothioyl)cycloalkanones
2017
A straightforward regio- and diastereoselective process has been developed for the synthesis of unprecedented symmetrical trans -α,α′-bis(diphenylphosphoryl)- and α,α′-bis(diphenylphosphorothioyl)-cycloalkanones, through the reaction of cyclic enamines with excess P -chlorodiphenylphosphine in the presence of triethylamine, followed by oxidation or sulfurization and hydrolytic workup.
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