METHOD FOR PREPARING 3,4-DIALKYL-2,5-BIS-(TRIMETHYLSILYL)-MAGNESA-CYCLOPENTA-2,4-DIENES

摘要

FIELD: organic chemistry, chemical technology.;SUBSTANCE: invention describes a method for synthesis of 3,4-dialkyl-2,5-bis-(trimethylsilyl)-magnesa-cyclopenta-2,4-dienes of the general formula (1): , wherein R means n-C₃H₇, n-C₄H₉, n-C₆H₁₃. Method involves interaction of disubstituted acetylene of the general formula: R-C≡C-Si-Me₃ wherein R means n-C₃H₇, n-C₃H₉, n-C₆H₁₃ with n-Bu-MgCl in the presence of zirconacene dichloride (Cp₂ZrCl₂) as a catalyst taken in the mole ratio R-C≡C-Si-Me₃ : n-Bu-MgCl : Cp₂ZrCl₂ = 10:(22-26):(1.0-1.4), respectively, in argon atmosphere under normal pressure in diethyl ether medium for 10-14 h. Synthesized magnesium-organic compounds can be used as components of catalytic systems in processes of oligomerization and polymerization reactions of olefins and diene hydrocarbons, in fine, industrial organic and organometallic synthesis, and in synthesis of biologically active preparations.;EFFECT: improved method of synthesis.;1 tbl, 9 ex