FIELD: chemistry; obtaining of butadienes.
SUBSTANCE: process is achieved through reaction of 1,2-disubstituted acetylenes with n-BuMgCl, I2 and CuCl in the presence of a zirconocene dichloride catalyst in diethyl ether at 20°C and in molar ratio R-≡-R:h-BuMgCl:Cp2ZrCl2 equal to 10:(22-26):(1.0-1.4). Addition of copper chloride (I) and I2 ether solution is done at 0°C and in molar ratio of components n-BuMgCl:I2 = 1:1.1 and R-≡-R:CuCl = 10:1. The reaction mixture is then mixed in argon at 20°C for 3-5 hours.
EFFECT: high selectivity of butadienes.
1 cl, 1 tbl, 9 ex
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RU2547265C2 |
