METHOD FOR PREPARING 2,3-DIALKYL-5-ALKYLIDENEMAGNESACYCLOPENT-2-ENES Russian patent published in 2007 - IPC C07F3/02 

Abstract RU 2291870 C1

FIELD: metalloorganic synthesis, chemical technology.

SUBSTANCE: invention describes a method for synthesis of 2,3-dialkyl-5-alkylidenemagnesacyclopent-2-enes of the general formula (1): wherein R means C2H5, n-C3H7, n-C4H9; R' means n-C5H11, n-C7H15. Method involves interaction of disubstituted acetylene of the general formula: R-≡-R wherein R is given above with 1,2-alkadiene of the general formula: R'-=.= wherein R' is given above and butylmagnesium chloride of the formula: n-BuMgCl in the presence of zirconacene dichloride of the formula: Cp2ZrCl2 as a catalyst wherein these components are taken in the ratio R-≡-R : R'-=.= : n-BuMgCl : Cp2ZrCl2 = 10:(10-14):(22-26):(1.0-1.4), respectively, in argon atmosphere, under normal pressure, in tetrahydrofuran medium as a solvent for 10-14 h. Synthesized magnesium-organic compounds can be used as components of catalytic systems in oligomerization processes and polymerization of olefins and diene hydrocarbon in fine, industrial organic and metalloorganic synthesis, and in synthesis of biologically active preparations also.

EFFECT: improved method of synthesis.

1 tbl, 12 ex

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RU 2 291 870 C1

Authors

Dzhemilev Usein Memetovich

Ibragimov Askhat Gabdrakhmanovich

D'Jakonov Vladimir Anatol'Evich

Zinnurova Regina Adikovna

Dzhemileva Galina Arkad'Evna

Khalilov Leonard Mukhibovich

Dates

2007-01-20Published

2005-10-20Filed