Reduction of Chlorophosphines with Various Metals to Secondary Phosphines
Kankyo Kagaku Center Co., Ltd.; Yokohama-shi 236-8605 Japan
Protonation of the metal diphenylphosphide formed by the reaction of chlorodiphenylphosphine with a representative metal such as magnesium, aluminium, zinc, or tin at room temperature gave diphenylphosphine in satisfactory yields. Especially activated zinc in THF was found to be the most effective system than other combinations. Transition metals also reacted with chlorodiphenylphosphine but were inferior to the representative metals except for the case of manganese as the reductant. Dialkylphosphines such as dicyclohexylphosphine and di-t-butylphosphine were also produced under the similar conditions from the corresponding chlorophosphines in 67% and 31% yields, respectively.
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