METHOD FOR PREPARING 1-ETHYL-2-AZA-3-METHYL-4- ALKYLIDENEALUMACYCLOHEPT-2-ENES Russian patent published in 2003 - IPC

Abstract RU 2218341 C2

FIELD: organic chemistry, chemical technology. SUBSTANCE: invention relates to method for preparing aluminum-organic compound that can be used in fine organic and organometallic synthesis. Invention describes method for preparing 1-ethyl-2-aza-3- methyl-4-alkylidenealumacyclohept-2-ene by interaction of terminal allene with triethylaluminium in the presence of catalyst Cp₂ZrCl₂ in argon atmosphere under normal conditions in methylene chloride for 5 h and the following addition of acetonitrile to reaction mass and stirring for 4-8 h at temperature ~40 C. Method provides preparing new compound with high regioselectivity and yield of the end product up to 42-58%. EFFECT: improved preparing method. 1 tbl

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RU 2 218 341 C2

Authors

Dzhemilev U.M.

Ibragimov A.G.

Khafizova L.O.

Gil'Fanova G.N.

Sharipova A.Z.

Dates

2003-12-10—Published

2002-02-12—Filed