METHOD OF PRODUCING 2,3,4,5-TETRAALKYLMAGNESACYCLOPENTA2,4-DIENES Russian patent published in 2012 - IPC C07F3/02 

FIELD: chemistry.

SUBSTANCE: invention relates to a method of producing 2,3,4,5-tetraalkylmagnesacyclopenta-2,4-dienes (I) of formula: (1), where R=C₂H₅, n-C₃H₇, n-C₄H₉, characterised by that reaction of 2,3,4,5-tetraalkylmagnesacyclopenta-2,4-dienes ( , where R=C₂H₅, n-C₃H₇, n-C₄H₉) with ethylene in the presence of zirconocene dichloride Cp₂ZrCl₂ takes place under ethylene excess pressure of 0.5-1.0 MPa, in molar ratio 2,3,4,5-tetraalkylmagnesacyclopenta-2,4-diene: Cp₂ZrCl₂=10:(0.3-0.6), in a mixture of diethyl ether-tetrahydrofuran or diethyl ether-dimethyl ether solvents, taken in volume ratio of 5:1, at temperature or approximately 20°C for 6-8 hours.

EFFECT: method enables to obtain the desired compounds with high selectivity.

1 cl, 9 ex, 1 tbl