DIALKYL(ARYL)-CIS-2-(2-HYDROXYARYL)-2-ALKYL(ARYL)ETHENYLPHOSPHINE OXIDES AND METHOD OF OBTAINING THEM Russian patent published in 2008 - IPC C07F9/53 C07F9/6571 

FIELD: chemistry.

SUBSTANCE: invention can be used for separating rare-earth and coloured metals and pertains to new phosphorous-containing complex-forming phosphine oxides with general formula (I) and methods of obtaining them: , where R¹ = H, R² = Ph, R³ = R⁴ = Ph, Me, Et, Pr, CH₂Ph, 2-MeO-C₆H₄, C₈H₁₇; R¹ = 4-Me, R² = Ph, R³ = R⁴ = Ph, CH₂Ph, 2-MeO-C₆H₄; R¹ = H, R² = 1-naphthyl, R³ = R⁴ = Ph, CH₂Ph, 2-MeO-C₆H₄; R¹=H,R² = Bu,R³ = R⁴ = Ph; R¹ = H, R² = Ph, R³ = cyclo-C₆H₁₁, R⁴ = Et, Ph. The method of obtaining phosphine oxides (I) involves reaction in a medium of an organic solvent of chlorophosphorinine oxides with formula (II) with corresponding Grignard reagents, hydrolysis of the reaction mixture and separation of target compounds.

EFFECT: obtaining new phosphorous-containing complex-forming compounds with formula (I).

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