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New phenothiazinyl-diphenyl-phosphine derivatives were prepared based on a synthetic strategy which imply two reaction steps: a lithiation of phenothiazine derivative followed by the reaction of the C-lithiated intermediate with 1 equivalent of chlorodiphenylphosphine. Sulfonation with chlorosulfonic acid or sulfuric acid gave water soluble phenothiazinyl-phosphine ligands. Structural characterization of the new compounds is based on high resolution ¹H-, ¹³C-, ³¹P-NMR spectroscopy, FT-IR spectroscopy and mass spectrometry.

Keywords: Phenothiazine, triphenylphosphine (TPP), arylsulfonic acid