PRODUCTION OF CONJUGATED DIENE COMPOUND

Japanese Patent JPS62298539

A

PURPOSE: To obtain a conjugated diene compound useful as an organic intermediate, a raw material for high polymer industry, etc., by one stage, by reacting a metallic 1,3-butadienyl compound with an organic halide in the presence of a catalyst.

CONSTITUTION: A metallic butadienyl compound shown by formula I [M is MgX (X is Cl, Br or I) or Li] is reacted with an organic halide shown by the formula RX (R is 1W20C alkyl or aralkyl) in the presence of a copper catalyst (e.g. CuI or CuBr) in a solvent such as THF, diglyme, etc., in an inert gas flow to give a compound shown by formula II. When a Grignard reagent is used as the compound shown by the formula I, the Grignard reagent is added to an ether solution containing 10W30mol% based on 1mol organic halide of the copper catalyst and the organic halide and the reaction is carried out at -50W-20°C in addition and 0W25°C after the addition. When the lithium compound is used, 0.5W1.5mol copper catalyst is preferably used based on 1mol compound shown by the formula RX.

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KOJIMA SHINPEI
KASAI SANSEI
ISHII TOSHIYUKI
HITOMI TORAZO
TSUBOI TAKASHI

JP13933086A

December 25, 1987

June 17, 1986

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TOSOH CORP

C07C1/32; C07C1/00; C07C11/12; C07C67/00; (IPC1-7): C07C1/32; C07C11/12

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