METHOD OF PRODUCING 2,3-DIALKYL-1-PHENYL(ALKYL)SUBSTITUTED PHOSPHOL-2-ENE-1-OXIDES Russian patent published in 2015 - IPC C07F9/6578 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 2,3-dialkyl-1-phenyl(alkyl)phosphol-2-ene-1-oxides of formula where R=Et, Pr, Bu; R'=Me, Bu, Ph, which can be sued in chemical industry. The method comprises reacting symmetrical acetylenes of formula R-≡-R (R=Et, Pr, Bu) with triethylaluminium (Et₃Al) in the presence of a Cp₂ZrCl₂ catalyst, with molar ratio acetylene:Et₃Al:Cp₂ZrCl₂=10:(10-30):(0.1-1.0), in toluene in an argon atmosphere at room temperature and atmospheric pressure for 4-12 hours, adding phenyl- or alkyl dichlorophosphine of general formula R'PCl₂, where R'=Me, Bu, Ph, to the reaction mixture at -5°C to -10°C, taken in an equimolar amount with respect to Et₃Al, and mixing at room temperature for 10-30 min, reacting the formed phospholenes with 30% hydrogen peroxide in chloroform for 1 hour.

EFFECT: novel effective method of producing compounds of formula (1).

1 ex, 1 tbl