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Synlett 1991; 1991(10): 743-744
DOI: 10.1055/s-1991-34766
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Alkylation of Phospha-ylid Complexes. Application to the Synthesis of 1-Chlorophosphirane

Pascal Le Floch* , François Mathey
  • *Laboratoire de Chimie du Phosphore et des Metaux de Transition, CNRS UM 13, DCPH, Ecole Polytechnique, F-91128 Palaiseau Cedex, France
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13. März 2002 (online)

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[Phenyl(tributylphosphoranylidene)phosphine]pentacarbonyltungsten, W(CO)5(Bu3P=PPh), reacts with iodomethane and methanol to give [phenyl(methyl)(methoxy)phosphine]-pentacarbonyltungsten via initial alkylation of the complexed phosphorus atom and cleavage of the P-P bond. Self-alkylation spontaneously takes place in 4-chlorobutyl- and 2-chloroethyl(tributylphosphoranylidene)phosphine-tungsten complexes, leading to (1-chlorophospholane)pentacarbonyltungsten and to free 1-chlorophosphirane, respectively.