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Abstract
In a convenient one-pot sequence, treatment of camphorquinone with sodium in dry tetrahydrofuran followed by addition of phosphorodichloridate and phosphorothiodichloridate yields 2-oxo-1,3,2-dioxaphospholes and 2-thioxo-1,3,2-dioxaphospholes, respectively. Similar treatment of 3-phenyliminobornan-2-one with sodium in dry THF followed by addition of phosphorodichloridate and phosphorothiodichloridate yields 2-oxo-1,3,2-oxazaphospholes and 2-thioxo-1,3,2-oxazaphospholes.