METHOD OF PRODUCING 2,3-DIALKYL-5-ALKYLIDENEMAGNESA-CYCLOPENT-2-ENES Russian patent published in 2009 - IPC C07F3/02 C08F4/50 

FIELD: chemistry.

SUBSTANCE: invention relates to organometallic synthesis, specifically to a method of producing 2,3-dialkyl-5-alkylidenemagnesacyclopent-2-enes of general formula (1): characterised by that, disubstituted acetylene of general formula R-≡-R, where R is as described above, is reacted with 1,2-alkadiene of general formula R'-=·=, where R' is as described above, ethylmagnesium bromide (EtMgBr) and magnesium metal (Mg) in the presence of a titanocenedichloride catalyst (Cp₂TiCl₂) with ratio R-≡-R : R'-=·= : EtMgBr : Mg : Cp₂TiCl₂ equal to 10:(10-14):(22-26):10:(1.0-1.4) in an argon atmosphere at normal pressure in tetrahydrofuran as a solvent for 10 to 14 hours.

EFFECT: obtaining new 2,3-dialkyl-5-alkylidenemagnesacyclopent-2-enes with high selectivity, which can be used as components of catalyst systems in oligomerisation and polymerisation processes of olefins and diene hydrocarbons in fine, industrial organic and organometallic synthesis, as well in synthesis of biologically active preparations.

1 cl, 1 tbl, 12 ex