Selective Hydrogenation of Cyclooctadienes Using Colloidal Palladium in Poly(<i>N</i>-vinyl-2-pyrrolidone)
作者:Hidefumi Hirai、Hitoshi Chawanya、Naoki Toshima
DOI:10.1246/bcsj.58.682
日期:1985.2
hydrogenation of 1,3-, 1,4-, and 1,5-cyclooctadiene to cyclooctene was carried out at 30 °C under atmospheric hydrogen pressure using colloidal palladium which was prepared by reducing palladium(II) chloride with refluxing methanol in the presence of poly(N-vinyl-2-pyrrolidone). The yields of cyclooctene were 99.9% and 97.8% for hydrogenation of 1,3- and 1,5-cyclooctadiene, respectively at the point that
1,3-、1,4- 和 1,5- 环辛二烯选择性加氢为环辛烯是在 30 °C 和大气压氢压下使用胶体钯进行的,该胶体钯是通过用回流的甲醇还原氯化钯 (II) 制备的。聚(N-乙烯基-2-吡咯烷酮)的存在。在环辛二烯吸收等摩尔氢时,1,3-和1,5-环辛二烯加氢的环辛烯产率分别为99.9%和97.8%。1,3-和1,4-环辛二烯(R1)的加氢速率表示为R1=k1[H2][Pd],1,5-环辛二烯(R2)的加氢速率表示为R2=k2[H2] 0.7[Pd],其中 k1 和 k2 是速率常数。发现醇是氢化的良好溶剂。特别是在所检测的溶剂中,在甲醇中观察到最快的速率和最高的单烯选择性。