1,7-Octadiene can be prepared by hydrodimerizing butadiene in the presence of a catalytic amount of palladium, a tertiary phosphine, formic acid, a base and optionally a solvent. High selectivities to 1,7-octadiene are obtained if the phosphine has the formula: R1R2R3P wherein Ri is a benzyl group or an optionally unsaturated branched alkyl group having from 3 to 10 carbon atoms with branching occurring at a carbon atom no more than two carbon atoms from the phosphorus atom and R2 and R3 are R1 or independently optionally unsaturated alkyl or aryl groups having from 1 to 10 carbon atoms.
1,7-辛二烯可以通过
丁二烯在催化量的
钯、叔膦、
甲酸、碱和溶剂的存在下发生加氢二聚反应来制备。如果膦的结构式如下,则可获得对
1,7-辛二烯的高选择性:R1R2R3P 其中 Ri 是苄基或具有 3 至 10 个碳原子的任选不饱和支链烷基,支链发生在距
磷原子不超过两个碳原子的碳原子上,R2 和 R3 是 R1 或独立的具有 1 至 10 个碳原子的任选不饱和烷基或芳基。